Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfa903a5efc26f5…

MALICIOUS

PDF

79.5 KB Created: 2021-02-23 08:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c3bb9f2be10e2cdea0a5081e6847bd68 SHA-1: 6342fb025c5cce8eb058887372df095abf2b822c SHA-256: 2cfa903a5efc26f521b28ed85032b0c521dedc0c3b15e3882f5744a54a6ea001
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://maypoin.ru/strik?utm_term=canon+mg2520+ink+cartridges PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403937/normal_5ffa16a98a3ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_60032f2627611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476757/normal_602e2a3b38698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414353/normal_6013d80b27f12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_5feb1885963e6.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/nowikowefufedax.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/kmLiirh/63475917965.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/rekipezinipegat.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/QhefKdq/vegas_slots_heart_of_vegas_free_coins.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/c2b3f3.pdfIn PDF document text
    • https://loleritukala.weebly.com/uploads/1/3/0/9/130969936/4172869.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/DggBbyO/lowe_s_phone_number_in_monroeville.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/IKiiNgc/bepukuxajun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5ff976f1f2256.pdfIn PDF document text
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/5808948.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/vuxabemid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_5fdb97e5a905a.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/tikoweravisixu/anemia_ferropenica_en_el_peru.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_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 5596 bytes
SHA-256: 74946f88f4893baa77aa7042c5ca9a3dc44da0487d80ce5034e8694f78a22f48
font_01_sfnt_off00010b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B06 11452 bytes
SHA-256: 0279d51baf25e8416a65a6aa3c23b5ae9e0dd6f32219467fe4ce063f943795e9