Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3106622131b7c98…

MALICIOUS

PDF

66.9 KB Created: 2021-02-06 14:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2aff7beed7abd5ad9cbb9c0a5e436ef2 SHA-1: 72ecce2bda9b2ee1273baff861122b914c0041af SHA-256: c3106622131b7c982dea31f26fcf1af8a7bbdc932fada002057cfbdeba1f5db0
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/123?utm_term=chase+mission+statement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fff63c33edb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5ff7727e0f456.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402707/normal_5fcea64156a10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5fca89f667083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_60071573cf382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5fce76ef3f0d7.pdfIn PDF document text
    • https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/kezaneropo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459780/normal_600298f37c8e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383922/normal_5fe18293136a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485821/normal_5fd3356237a1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411919/normal_5ff5ed19574d7.pdfIn PDF document text
    • http://avit0.pro/777_book8u836.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/tojazudibumogab/15255655934.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/21705345592.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/atomic_structure_and_periodic_table_review_worksheet.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_off0000cbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE1 4700 bytes
SHA-256: 039d4d88a9a85805c7d0f8f588d4fdaab15bfaaebd1d68ea56343977f96c2618
font_01_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 10420 bytes
SHA-256: c14989dba31d308d28efb937e371f821583fb3bdd0a3902a014139de3611866a