Malicious PDF — malware analysis report

Static analysis result for SHA-256 485b138230b662b7…

MALICIOUS

PDF

88.7 KB Created: 2021-08-06 06:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fa2a883f2f4e1cff8fb84102f5204505 SHA-1: 03ef04e0971724fd4e3f9810f01ef744b975673f SHA-256: 485b138230b662b7e80578b029b083ea20a2bad64ef14a74131166b703d2928b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection, strongly suggests malicious intent. While no scripts were explicitly extracted, the nature of the links implies a potential for further exploitation or redirection to malicious payloads.

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://cructi.ru/uplcv?utm_term=how+to+deal+with+narcissistic+personality+disorder+family PDF link annotation
    • http://unseretochter.ch/images/file/96157047076.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/godikojipow.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/fc6aabc711b53c1e67524e742044d9e0/zebobebazupeluvovokate.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5971303edc---92885190502.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6d32148f9f95e14bdb6992f2c7d9c021/loxofabip.pdfIn PDF document text
    • http://huiking.cn/uploads/file/160414359872.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c6b2ee640bc668eb6af553671859547e/37003609192.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9569e98e1---21257187555.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4328a1af6---dozezojomixugejewive.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/84026744891.pdfIn PDF document text
    • http://clinicaveterinariacittadivignola.com/userfiles/files/tumakigot.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/82682083108.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c2fe31ea---gufulaselajufuv.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/572aa54e0c150135c42c24910ada788b/paropiweke.pdfIn PDF document text
    • http://www.moyekolodin.com/files/10050153930.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/82147149207.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/luxerafiwilogule.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608370274d6e4---72114367682.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/54741091843.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/94366243725.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///81991863569.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b96af82cbd---15767636725.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/fc033621b0554560421d2379a202a98b/98412358934.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/079b211e9fecb9b8bd9b4872505e1e1b/xiwopu.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/5vp3m5h27am5fn1fev5pratfhr/vikakavuwivi.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/tolifol.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/wopolotaxopimegeninituv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 11076 bytes
SHA-256: f8aee6da47c7b422200ed8a16876352efb8c6222642d8851980a45e30eb4ed81
font_01_sfnt_off0001120f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A21 16412 bytes
SHA-256: 1eca7969484df2e37d0242292a27aeed75dbcaced6d3eb7cac61cb4c90bd6504

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