Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55a077c1dc260cf…

MALICIOUS

PDF

69.0 KB Created: 2021-02-14 01:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aa3d14dc3e4c367d420b733da85b3069 SHA-1: 8544c9a01dd941b83c3e4cbfacc88956bd4092bf SHA-256: a55a077c1dc260cf07c1073ea1075e864165979d12ec548b45ce239e11002e55
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=beautiful+boy+by+john+lennon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378164/normal_602838004e246.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/fj0jiif/sapegiv.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/TWxAygg/ravens_steelers_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_5fda8547046ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd2ab628cf4e.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/fgjNdha/fipukajoviratilajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_601b39b7d3c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_60285ab2dcaca.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/J2hfNhe/tufokuxujofak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_6024c72665540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_5fe8dddf618d7.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/folexapurilowe/75019025884.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/reckless_crossword_clue_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/leukemia_research_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/car_parking_game_hack_mod_apk.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_off0000d196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD196 4948 bytes
SHA-256: 20f43359316d41483f2f97631ad13f0e9519cdac70d29b7f09a30a0a213737c6
font_01_sfnt_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 10756 bytes
SHA-256: b28c81c68ef1edbb29167cb0818269a7d22039e6b5b711bb367e69dc2cb769cd