Malicious PDF — malware analysis report

Static analysis result for SHA-256 e574a0c9ae6c1771…

MALICIOUS

PDF

67.2 KB Created: 2021-02-21 15:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ffe6268118f58c8fbced7c1a6defc9df SHA-1: 2882b6d4213f1795e9cf64716e1e5e304dc1cf5e SHA-256: e574a0c9ae6c17710fe11224f471f2ee1042d1581b5638d881d019a7e2e85efa
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://jacksth.ru/wix?keyword=pre+algebra+martin+gay+6th+edition+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481163/normal_601f2fdd4f89a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fe4d3eb8cf06.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/taxuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420448/normal_5fe37f46a6285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367911/normal_5fc9ae7f6beac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5fe0d044b2837.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/4ijjijd/crossword_puzzle_maker_with_clues.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458431/normal_5ff78f6c47da8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_60026f7a8d3e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5fd0e95411f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_602e27c7c0a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fdaeabc57568.pdfIn PDF document text
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/rejopur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_60134b51c3725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5fe349d1972c6.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/pesetufavo/blockers_spy_for_instagram_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/passport_application_form_tanzania.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/book_design_template.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_off0000cb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2B 5764 bytes
SHA-256: 4e815ba8a67a5a1d251b29682d5d930d89a936f01b7f0d92a149b024edf5fc3f
font_01_sfnt_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 9668 bytes
SHA-256: 14ff8b2db1e898b7f44e5d5d04e515a5008adfb39dcb26e96a7f521d8a859332

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