Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b4494b96bfae71…

MALICIOUS

PDF

69.7 KB Created: 2021-02-12 15:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0850cf6b251c3d33f2031f08e2b07c51 SHA-1: 083c8696793162b039f401be1ddc31c569528645 SHA-256: 55b4494b96bfae71e38954527085ccf25e048b42fcaf78c8e48b1daa4fdf53f9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=iem+headphones+meaning PDF link annotation
    • http://exemplpusj.com/966647619p6nph.pdfIn PDF document text
    • https://gijedilegin.weebly.com/uploads/1/3/1/3/131380969/1920255.pdfIn PDF document text
    • http://arendagg.xyz/76729570744ks0kn.pdfIn PDF document text
    • http://skidki-day.shop/zijeguxizitufn1a8.pdfIn PDF document text
    • https://lovizedisar.weebly.com/uploads/1/3/1/4/131437361/7fe04f7ea63.pdfIn PDF document text
    • http://wow50.pro/bolanawowajoxupimuvojakodcvzmq.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/cc070b6.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/wuwosepobixomerxm8sp.pdfIn PDF document text
    • http://fabulouss.space/supibutevalakbjem9.pdfIn PDF document text
    • http://nibelv.xyz/31374431615zocs.pdfIn PDF document text
    • https://polalakenasi.weebly.com/uploads/1/3/0/8/130813885/3076778.pdfIn PDF document text
    • http://albl.ru/6138453928xnet6.pdfIn PDF document text
    • https://munivimisidifi.weebly.com/uploads/1/3/4/7/134772296/3669029.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/rolefosiju/77392899918.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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5180 bytes
SHA-256: 39b50433b26c93404d76b711f75051145c764dc29abcea5fc4c3fe83ad9d48cf
font_01_sfnt_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 10688 bytes
SHA-256: e6f30dfe1c4b72ec619bcde2476298162133209171031bf9b5550f5df503dc21