Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd3487525d972f8…

MALICIOUS

PDF

65.6 KB Created: 2021-02-10 16:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6ef64885e886d3d81f8451df58762116 SHA-1: 18e1253022804f1576b52dd0f58f0fc535a09fa2 SHA-256: bfd3487525d972f89f347e2022dfb8acdf5d20ce38c8ff48a4acd606152e4657
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://jacksth.ru/123?utm_term=bluetooth+cigarette+lighter+target PDF link annotation
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/f7cd3f9.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gIgG0hb/21339269212.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/f674b.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/xisuwixax.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/527565.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/xegipoluxut.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/hcTGicc/xozodejizifexosizaxox.pdfIn PDF document text
    • http://cmb-societe.com/romans_bible_quiz_questions_and_answers1x7vy.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/c3da46baaeab73f.pdfIn PDF document text
    • https://lisebilapuwuw.weebly.com/uploads/1/3/4/0/134096741/wexozijopima.pdfIn PDF document text
    • http://avbox.org/309681222766xdqa.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/85e45d8ed0eba.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/lonezavoxeb-domufamozo-renabajatujonuz-logeweje.pdfIn PDF document text
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/simuj.pdfIn PDF document text
    • https://lizelizana.weebly.com/uploads/1/3/1/4/131409616/6184fee09fdd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F3 4932 bytes
SHA-256: 03c267e4e7cb9373228e8230631e203004009f48417ead13d3c8f67f409fefd4
font_01_sfnt_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 10544 bytes
SHA-256: 1aaa7d6e2f9a6e470878f74a9a661a102c84b8f6efc7a36480a5a4efbd37976f