Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c5bc325721b13c…

MALICIOUS

PDF

61.8 KB Created: 2021-02-18 14:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5a9a5cb3f46485c3c222e66d8a7ecc0b SHA-1: 63f76b51844207ef81b6f11da80b79f90a1220a4 SHA-256: 98c5bc325721b13c4c3499ad0615934a3b292c78f14659cb05d17062518f14f8
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://bologen.ru/123?utm_term=how+do+i+contact+ge+money PDF link annotation
    • https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/lusagise_pukex_bojas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_60275efcc52b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447658/normal_5ffe6ccd54f0f.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/zobawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_6019b5ddb525a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fe2c47f61c41.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/mipeboro/u_dictionary_application.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/kenenezatine.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/50103179765.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/25472862415.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/bajeroboxutipafafujopad.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/56116702013.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/classifying_chemical_reactions_worksheet_answer_key.pdfIn PDF document text
    • http://gotenekopibijo.epizy.com/fejozoripatix.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/96836077047.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_off0000b47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47B 5108 bytes
SHA-256: 9da2b5010a64ceaeed8ecf10f34c7a68e4c09bfe3f91c4513c9ed2d925a1c90c
font_01_sfnt_off0000c5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E2 10744 bytes
SHA-256: fcd824c5072c056477dc19755a8d327664166d09b929145d680efd15a6850827