Malicious PDF — malware analysis report

Static analysis result for SHA-256 f415f0ad535996a3…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 16:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 78e981edadf15cd41c0ac6e384e8e171 SHA-1: ca62e21d2b52c38f9016c7800662bc0aec7c8db5 SHA-256: f415f0ad535996a3490b1c6036ff15868a47caa565197eab58b2d4502edb5132
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/aws?utm_term=how+to+install+the+hp+laserjet+p1102w PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6013aff6700d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458616/normal_600d3ac67b3e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387054/normal_60033673702be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_5fd18b0d82481.pdfIn PDF document text
    • https://pabarubuvu.weebly.com/uploads/1/3/1/3/131379718/gebuwotubet_buvoweripekob_lezej.pdfIn PDF document text
    • http://coloradocustomelectric.com/forsaken_world_talent_calculators32el.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hhwhfNX/kadofixejosonalolulom.pdfIn PDF document text
    • https://nilidufudomalo.weebly.com/uploads/1/3/2/7/132740748/zabab_bokenewakevetas_rubozoz_mefer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5fe0b7b063850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5ff6342959fa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5ffec292c63f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_601ed8a8e04f5.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/jijari/webasto_diesel_heater_white_smoke.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/raiders_logo_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/belufuj.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_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 5360 bytes
SHA-256: 726cb32264245e32d1cd19da17255891592a5d5cd4ae91a289446bda2d22bfaa
font_01_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 10656 bytes
SHA-256: 093f2833ad419a36a6d65816499464b936d9cd220406450b67d1a3180c60a2a0