Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79acc938092024d…

MALICIOUS

PDF

69.3 KB Created: 2021-01-25 14:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 385eae9bd6ec511d2bc4c13cb835fc25 SHA-1: e9dc86bfca3d882c73c23cde1aac2373ca15d0fe SHA-256: a79acc938092024d167a13a94bc2b87f1af2c90b99bb54b0c9528d58f29f17b3
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://baarspo.ru/wb?keyword=arena%20go%20builds PDF link annotation
    • https://waripeseditalas.weebly.com/uploads/1/3/4/0/134012866/2263220.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/wegurorojatakodosilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fdc091cb52a1.pdfIn PDF document text
    • http://kvyovk.xyz/1948036799h7dh1.pdfIn PDF document text
    • http://storefromit.pro/toon_blast_game_download_for_pcybuvp.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/8807531.pdfIn PDF document text
    • http://qqkaxes.xyz/elements_and_principles_of_art_and_design_quiz1n8sp.pdfIn PDF document text
    • http://thailandlove.site/stir_the_new_free_tvkqpc7.pdfIn PDF document text
    • http://hushseo.online/battle_plans_hoi4rx390.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/1764806.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/tonop.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/dewazewokib/meduruk.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/92893109415.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/kejetimoxujuzog.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/88126574728.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/god_of_war_5_java_game.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/43514831184.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/fabukuwodemeb.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_off0000d403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD403 5120 bytes
SHA-256: 2abc88d8f2a78b41e9cf554cfe67b2909961a553f10f2a014c1242c67857bc81
font_01_sfnt_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 10320 bytes
SHA-256: f11584ea0d50ae36f2d555d0e91753a9de1aef1622a74ec665e356c1b29b0e98

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