Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85d4d30cd1520e2…

MALICIOUS

PDF

76.1 KB Created: 2021-02-25 23:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1ad7a8f268d8c7b7ba32a1df2806291d SHA-1: 88a355146a4c5703b28e5bc3a2fc8aff4e2b39f9 SHA-256: f85d4d30cd1520e2de3e2db97899b5b49f2f3b4d52241cc3b8828975ee771959
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=the+eftychia+project PDF link annotation
    • https://cdn.sqhk.co/ferorigife/U2jb7ha/twilight_struggle_deluxe_edition_review.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/6s4gfhc/fly_racing_gear_near_me.pdfIn PDF document text
    • http://xokoden.22web.org/18275486190.pdfIn PDF document text
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/kumisabuje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rebagada.rf.gd/catch_me_if_you_can_cast_bank_teller.pdfIn PDF document text
    • http://buwozefavimim.epizy.com/vodijipugovitobogesu.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/banner_saga_characters_guide.pdfIn PDF document text
    • http://wuxigukupem.epizy.com/jafuwapek.pdfIn PDF document text
    • http://dadojusox.epizy.com/tufoloxegamejitaruf.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/71318224474.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/hwy_217_traffic_report.pdfIn PDF document text
    • http://furugavasipif.epizy.com/egyptian_art_and_architecture.pdfIn PDF document text
    • http://buvetixebofexe.epizy.com/viduwokorife.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/all_india_train_route_map.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/kopenakiselediduzuj.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_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 5020 bytes
SHA-256: e75f70705ddc56598912e3f656daa1995c4db66322ca9235ceeda74b89fed63e
font_01_sfnt_off0000ffde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 10496 bytes
SHA-256: 40a5c558bf1739fb83bfa7f61b3ee34014c3278051c979d3c5e5b3ef1cc6583c