Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cde1d03ce2299b…

MALICIOUS

PDF

91.6 KB Created: 2021-08-01 04:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eda322d1bf2e1353d4a6869baedbb476 SHA-1: 98a7c94a00aa9203c66743aa286e00bd666fbb4d SHA-256: 25cde1d03ce2299b3a43ac900d6e9f900c94d777c543af9136ef470c276e1922
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and numerous links to external URLs, many of which point to potentially compromised or disposable hosting. The high-confidence ML detection and ClamAV signature indicate malicious intent, likely to redirect the user to a phishing site or download a second-stage payload. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/v77qj5jigb53nbj4tmvqhv2nh2/talafasesigikakiwexasi.pdf In PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b449daa909fd8f0b04948fea42af82d1/ruzanimuleze.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/83245195455.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c543851f1---meponubiwemulalisimid.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/48950527074.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d70950911---66069762536.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/fuwebazawefikikumudus.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/68030662363.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/bipojipobunapu.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/1852058569.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3caf9c690a---rijelefetojefiwamara.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070c40655230---75985696074.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/77475534752.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/zevod.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/edc1653a846278cf88297e04fa4799cf/94822005704.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd042f388df---10266157686.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161058a50a567c---45990405657.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/10432954995.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/bce6a91b73a6e7a13b735c56f155f12c/58327954780.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83108eca4---pegato.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084159c0c58d---zelir.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/kadetubukobowukipasilesap.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/tagapizasakif.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160779d3b13fcc---39834551024.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1ejbc654vdvt4g6u98k3dcidd0/niwodavirufuvepejimofazes.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/9131303973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=solving+logarithmic+and+exponential+equations+coloring+sheet+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D83 20768 bytes
SHA-256: 744b7415edd55e5905146fadca6fda1e5d6868a4c46e2220bf77294fe8da2b19
font_02_sfnt_off00014473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14473 11536 bytes
SHA-256: 4a1a16dae3f7028f4a57e101b2a6bf973afe4a1f974f0ce2dbbbb11c9425c452

Open this report in the interactive analyzer, or submit your own file for analysis.