Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3ca85cec86aaaf…

MALICIOUS

PDF

86.3 KB Created: 2021-09-16 23:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 60cb262a49a183b225fdc169639e869d SHA-1: cb7085ba38652f0d071952a0d0e3938e6e7f2cb4 SHA-256: 0e3ca85cec86aaaf389f4929f79d24784952b233c30fc4a01845d5d6c0a72b53
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's designed to redirect users to malicious sites, likely leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=english+short+stories+pdf PDF link annotation
    • https://warsztatgdynia.pl/app/webroot/media/files/55762035138.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/29963712957.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/dojawiwomarerugudi.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1nv19uifsmj24eju8qtaqs5rb7/kigatinaxataguxisiferav.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d02f24175---xuworidufinezexinuge.pdfIn PDF document text
    • http://rc-modeller.se/images/file///kexanenotinadojamupaki.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210909045146_g745yv.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/68602648611.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/bakixeginesubudutisefir.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/362559083.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/kalaben.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/73303240217.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/46295088265.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/47687207469.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/fuvixixe.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/79666520360.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/77140534403.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/18372868092.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/88291908121.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/45686442880.pdfIn PDF document text
    • https://preciseenergygroup.com/media/52367406364.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61822117344.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/fonelaw.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109021335214737.pdfIn PDF document text
    • https://pepsima.biz/files/file/18866557111.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/1uh3508jn12uvpjlhs5oaook6c/lajojasoxofemogema.pdfIn PDF document text
    • https://network-italia.it/file/40397825008.pdfIn PDF document text
    • 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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 10600 bytes
SHA-256: 1a66ea5d5cdb57a9978d1dff2cda68fefe6c22548e2b6b8cef738f57f943cda1
font_01_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 18948 bytes
SHA-256: c4728b22554954591070334eca1cb8eef9dcb0287afb438a4c1c0fdae0516f07
font_02_sfnt_off00013314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13314 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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