Malicious PDF — malware analysis report

Static analysis result for SHA-256 a776c267a85f1b33…

MALICIOUS

PDF

61.9 KB Created: 2021-01-20 01:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 65ce64f4fd08e8667dc49ceb5b84f6cf SHA-1: 52d474c852c30ad1893d1f787d1f4531dc6528a6 SHA-256: a776c267a85f1b33b904e1794fb10e4e60fed75e20e2b3c5075e69bef78d0273
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://druttle.ru/wb?keyword=halloween%20costumes%20for%20hire%20near%20me PDF link annotation
    • https://cdn.sqhk.co/soredepel/hjriija/tip_top_drive_columbus_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/3hbhhhe/sound_effects_prank.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5fb4c42b5f5ab.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/5gj3fBJ/pick_me_up_cafe_yelp.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/3gdidgd/sniper_shooting_games_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/sheicjg/treasure_hunt_online_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f9687d7e79ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5feb8ac572908.pdfIn PDF document text
    • https://rudumareta.weebly.com/uploads/1/3/1/8/131871695/9ba353ade90d.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/RFBHQQM/56814177945.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/voxipanovigepiv/dejilekewakozutipol.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/deep_learning_in_python.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/sidowidutiridegagu.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/stay_focused_go_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/93431159096.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/reported_speech_reporting_verbs_exercises_online.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/bosch_capsule_filling_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/ear_clear_plus_refund.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_off0000b688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB688 5172 bytes
SHA-256: be91103cc1ce8d7a5ab866e067c524b9bfb53a59f69499d0deb6b76260f2e28c
font_01_sfnt_off0000c802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC802 10108 bytes
SHA-256: d9fdec2584b4074fcf97cb7e53204fb5b5316fcd09c2c0f06ce7995a26748219

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