Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2684019bcc1601f…

MALICIOUS

PDF

77.8 KB Created: 2021-06-17 20:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 62feb59558e81bd64afa47d2ae3e62c7 SHA-1: e5c2fcf557728781ccdca4ee22503b541ebfa0b7 SHA-256: c2684019bcc1601fd14f5c418cc54de7cf7603d3f817d652c201338b9e22ca63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'O blood type diet pdf'. No scripts were extracted, but the presence of numerous external links points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=o+blood+type+diet+pdf PDF link annotation
    • http://badaranquehablar.com/userfiles/files/8991495482.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e36d6202e---wokodibozodolivi.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/xusazexuvedo.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/73642810601.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/71932061180.pdfIn PDF document text
    • https://bczenekar.hu/files/file/gasagilejofav.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/8a5af5b5a2b0e59dd2dd54cd80c09e49/49798763091.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/najoboguzesavitoj.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/de4b1daa5413d82e4bc8ab3713606a3f/benonibow.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ril5k3tmq7fu55vgvumv9gh3r4/29483500661.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vefexuxumetewoki.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/likadin.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/a6da12b63a3dcec40feacfbffe73b87d/12728078382.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/fuzosibekatepexiredasajum.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/43d9ef2ab3e5396c353d30aae3a73c5f/pilofejunimuteguxuregosu.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/3e44344118459e2fd4345a6345ab585d/botag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 4820 bytes
SHA-256: 3d4db16f9054fd14737a0be32b9d4a9048e957c926416756cecf8685cad5d9e0
font_01_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 10324 bytes
SHA-256: 4e67f2228326cd78bce89d4e7f94e2107faaf06b639a012af74f303111c2dfa0