Malicious PDF — malware analysis report

Static analysis result for SHA-256 702053f87fe45352…

MALICIOUS

PDF

69.3 KB Created: 2020-11-27 10:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ccfb1fb522b38624ac8ad982e227d32 SHA-1: de9e986d505a483ba497570b667a8e6c69babf67 SHA-256: 702053f87fe45352282acc3739f2924e198d854cdf9ec15055e3ea958ae538a7
202 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. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=computer+shop+bill+book+format PDF link annotation
    • https://sopudediliwaweg.weebly.com/uploads/1/3/4/5/134587721/a9111.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/wivetegijelo-duvabudol-niloberenil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_5fb5de379f40e.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/filubelede-wapefoliremided-tomona-remexilobawot.pdfIn PDF document text
    • https://dodawuwaxa.weebly.com/uploads/1/3/4/3/134305805/sikunafinem.pdfIn PDF document text
    • https://duxujemiw.weebly.com/uploads/1/3/4/7/134743688/ecc78aa0a0b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_5fb79d527f571.pdfIn PDF document text
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/wotugimipa.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/zuwomanovub-zidixi.pdfIn PDF document text
    • https://kinoxumore.weebly.com/uploads/1/3/4/4/134463035/pifuxakulukafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495262/normal_5fb7bda880695.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/b89073ada1cd6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5fb275a1d6849.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/toliwudalamem/wesasaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/bootstrap_datepicker_format_angularjs.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A5 5248 bytes
SHA-256: 0e8328c469ba993a8e3e29feaba410790e5ffe9e37c2e400b42933a7dec857fb
font_01_sfnt_off0000e347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE347 11112 bytes
SHA-256: 4b5a4f85be485b6a59a41ee42f167cbd5c9b014f62467de153c81c69d1872edf

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