Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46b2c0d3b0bc17b…

MALICIOUS

PDF

81.6 KB Created: 2021-03-09 13:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 17bc949f5f91bbfb927999aa80d9f46e SHA-1: 3173555f7e81ffee1a69637cd66c0bc10f628b3d SHA-256: d46b2c0d3b0bc17bb2d9ee6a193ae0b10c8bb227265f0bac89c4e4ebd2887249
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/aws?utm_term=massey+ferguson+35+petrol+workshop+manual PDF link annotation
    • https://bovaxomasomi.weebly.com/uploads/1/3/1/4/131437143/kesibojuw.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/mowopavikeg.pdfIn PDF document text
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/d3d63ac6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_60132a04d39e3.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/wirakonidodemaj.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/9886601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_601ef282466ab.pdfIn PDF document text
    • https://genopajixon.weebly.com/uploads/1/3/1/4/131452954/eeceeea03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fd610cbc62c6.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/wabepojubetuzat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fd39ba55a382.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/69773b08.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/wemijego.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/tijudat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_603d562a4f84d.pdfIn PDF document text
    • https://gidixolatuloxag.weebly.com/uploads/1/3/1/0/131071157/vosiziluluwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojogisi.epizy.com/lasawubiguzizufopev.pdfIn PDF document text
    • http://mudalulox.epizy.com/how_do_i_trade_bitcoin_on_luno.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/heart._org_eccstudent_pals_pretest_answers.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/gakatog.pdfIn PDF document text
    • http://nemebikox.epizy.com/27362899270.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_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 5868 bytes
SHA-256: abe295df9a5e16e40cae9842d1fdd045c06332ed86d716e71079f06abbe62b07
font_01_sfnt_off00011600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11600 10096 bytes
SHA-256: 1c4c763f3361ff68bb5ed7eef1d12da34021f2753f44689c26f0b8b465361479

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