Malicious PDF — malware analysis report

Static analysis result for SHA-256 35cd86d02e824619…

MALICIOUS

PDF

73.0 KB Created: 2021-02-22 22:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8c3170a55cf8b003798365661ac71af1 SHA-1: 5c79682be514452cfbb336405610611775d37e56 SHA-256: 35cd86d02e824619281ab237e9a5fa6b42770c3f80b40e597e621baff49f3028
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://seumenha.ru/wix?keyword=cell+growth+and+division+test+answer+key PDF link annotation
    • https://ninefajesazaga.weebly.com/uploads/1/3/5/3/135384029/jurumejapiw.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gegjvqB/33064752632.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/AmFShiU/siren_head_vs_ice_barbies_3d_game_engine.pdfIn PDF document text
    • https://bubipirem.weebly.com/uploads/1/3/6/0/136086135/2111511.pdfIn PDF document text
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/3186096.pdfIn PDF document text
    • https://zedimubaxujejit.weebly.com/uploads/1/3/4/7/134715534/bofakitisixe-jaragetek-tujuxaruremewo-biworajale.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/kuriwuvud.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/gedexim/zaninas.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/zabetorelobatus.pdfIn PDF document text
    • http://tokekiloxak.epizy.com/beginnings_and_beyond.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/43083505073.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/what_is_the_best_air_force_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/25070179344.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/fibulir.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/dimudomowafo.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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5312 bytes
SHA-256: cfd9d11a6f1196741a5bc14138cfbb806505aba6b3e71faab296fb29c259f2bb
font_01_sfnt_off0000f3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 10316 bytes
SHA-256: 6f4f9f34f7fe59fc97a588bd39889d6b3351589643fd837c53bccc01a1c266dc