Malicious PDF — malware analysis report

Static analysis result for SHA-256 081b124d8dffa307…

MALICIOUS

PDF

67.2 KB Created: 2021-02-14 02:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9c6985d0fb894b96cbf3288f6335e6e4 SHA-1: 0a4c145372a801a4cc0375cfc48d2c027253921d SHA-256: 081b124d8dffa307da76a81329685b1e08f7186b37f0400710823e46e8f0e26b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=100+pics+answers+colours+81 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470232/normal_5fe20f25c04e2.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotefi/c1LghnU/best_vr_horror_games_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_6006708f652cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_5ffa4f1756912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fcc9a28d28bd.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/jumpstart_kindergarten_1994_puzzlessgdnp.pdfIn PDF document text
    • https://piluzixalevuj.weebly.com/uploads/1/3/5/3/135345731/8981a691.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/7552896.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/1190579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fd2040286fa8.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/tinajabizoreguf/golliwog_s_cakewalk_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/writing_complex_sentences_worksheet_ks2.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_off0000ca7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7B 5312 bytes
SHA-256: 2e7e957693a2af9bcbdf37f2ee273bce84aa90a6e8ba381ba508ce63c5beb3ca
font_01_sfnt_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 10468 bytes
SHA-256: ac003f008ddf3570fa32eb639d6bb23e60b054a940f0e85aab89fc364f8c5ed1