Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f21c6c61fe98ee4…

MALICIOUS

PDF

70.5 KB Created: 2021-01-08 01:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 179de1ed98098355120bfb6bdbb89bfc SHA-1: 1e5047c76b00c2b6bacf6976d1145921bde5b0b8 SHA-256: 8f21c6c61fe98ee4fa0f644d2a1c0c1a3965fd243a14dfac1e29adf1b1396254
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://traffnew.ru/wb?keyword=afterpulse%20elite%20army PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443354/normal_5ff48a09c6d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5fc30dab20499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5fc9080a4a891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8709a652e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488314/normal_5fb253be1e700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_5fe6d9a59b813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fede03889824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fd225a0a18fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fa4d5e4a81c3.pdfIn PDF document text
    • https://bufasadapigeze.weebly.com/uploads/1/3/4/3/134307931/9047835.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476135/normal_5fc91edace01c.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/6760440.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/mulerux/69324158404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9416b3f4-fc9d-4621-a2a9-d6360c01da0b/17239490205.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/chia_ying_lin.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_off0000d7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CC 5140 bytes
SHA-256: bc9f85c6b442eb4a8f0a2ea5bce13003ca0d28ff6940b5c8f1eae4aade48d9cc
font_01_sfnt_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 10628 bytes
SHA-256: de3cb55d24efc8727ac4c585f614d9f73f40f315be1fadd7689505cab02b844b