Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d55663483c3323…

MALICIOUS

PDF

72.1 KB Created: 2021-01-24 21:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1b426d4224c46628a595d0b2a558beb2 SHA-1: 7f172260c3b47ca79c85c1c1e43f5366ae8f5fde SHA-256: c2d55663483c332384aedd3f9c7c271ab9b0655796c0e858efda8f32f0595fc2
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=stevens+model+67+series+e+12+gauge+manual PDF link annotation
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/sofokekukum_fegelarerinedos_rerapuvebinevoj_soxix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380228/normal_5fdfc76f8196f.pdfIn PDF document text
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/917a4f4.pdfIn PDF document text
    • https://nikakakuko.weebly.com/uploads/1/3/1/8/131871571/dipufijumiw.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/g6if4ia/soredigabepadipexagek.pdfIn PDF document text
    • https://bigufoxorifef.weebly.com/uploads/1/3/1/8/131871864/dodidonenenal.pdfIn PDF document text
    • https://xulasimij.weebly.com/uploads/1/3/2/8/132814518/kanesezuxofit.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/xusukasumanog_lopimorozowuna_wuvil_buburafifazug.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/e5fd622.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501361/normal_600060400f06e.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/aiejjgc/tiberirisebogadewu.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/semuxemakaw/the_founder_movie_guide_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/safety_data_sheet_for_creosote.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/44026181498.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/mystudentbody_drug_test_answers.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_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 5728 bytes
SHA-256: 3fa08b72940d9b0903d972892b9a643ea9b22592e1e5da77ed81f8bd093edecc
font_01_sfnt_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 11432 bytes
SHA-256: ab8359a694c0b056e5e11c3c67da81ad0ddb35d1751bdeeaa4eafe41ad3d8bec

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