Malicious PDF — malware analysis report

Static analysis result for SHA-256 a754fd3f0a0e4208…

MALICIOUS

PDF

70.6 KB Created: 2021-02-23 15:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 839b1db150f61ed46f6f4c0fbc08ff04 SHA-1: 14a181c1e6b5a2465ee1da5e3d44f11b3105a6b3 SHA-256: a754fd3f0a0e420833782b4c247ccad2349443b54d11755d0af511171a65b6de
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=unblocked+66+ez PDF link annotation
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/vilonusutoporomozul.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/xuvekibivaxolat.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/aHyWRij/92233417645.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/c9hjCii/nodezekuwedopikufuvisojiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/16847338191.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/jacoco_coverage_report_m_c.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/company_financial_statement_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/herbalism_farming_guide_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/88616922474.pdfIn PDF document text
    • http://wokudalewab.rf.gd/48355407773.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/best_antivirus_android_reddit.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/anjaam_full_movie_film.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 4848 bytes
SHA-256: 6130fc4b3632509366be2295aac305edd6b36294c04a88581d4971476d983460
font_01_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 10080 bytes
SHA-256: 44db188145eae60c7ec01c8d3d2482c857ff2aca7eb2347c132102b97a3b1983

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