Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec740239cbadec0a…

MALICIOUS

PDF

72.1 KB Created: 2021-03-01 14:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f4dc9ed08a4fbf2a0ba19b026a419117 SHA-1: db9b89a315ab8b6f28c7ef9a49353581b4e0b3c0 SHA-256: ec740239cbadec0aa2f6b9614e792388dc33702017d696379434775cf5b2dec4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=free+family+tree+template+in+spanish PDF link annotation
    • https://cdn.sqhk.co/tazifawixax/e7Nihgf/85475309693.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/SigRzge/35675385843.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/gg7ngib/jump_zombie_chapter_2_password.pdfIn PDF document text
    • http://creampiepow.club/20250272303azsb.pdfIn PDF document text
    • https://bupitubijas.weebly.com/uploads/1/3/4/0/134040922/tisoxupiregej.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/oVggLii/gikifugumozasadidiwisozi.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/xivaxivozopizaz-mowana-zowaderedezajip.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/hgdijjf/zunozaximigelarabeko.pdfIn PDF document text
    • http://gogotmif.space/mexolujagugadekisopoxog4y3q3.pdfIn PDF document text
    • http://fastgetme.online/8497480163hd8n6.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/fopalew/3d_effect_video_clips_free.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_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 5196 bytes
SHA-256: 67f6f2b9691a002ce9ee110f36e64b8f707e866699b79fc22917778fbeb7ece9
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 10068 bytes
SHA-256: dcd686a589f932d370e22a53a625d13b45f3ec09827e8515134a1be786fb09ca

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