Malicious PDF — malware analysis report

Static analysis result for SHA-256 da213f26282fa207…

MALICIOUS

PDF

73.7 KB Created: 2021-06-10 19:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e0f0be1bb560c2c7c4dabebcaca46a6d SHA-1: c6debd259e2f6f5930a6006b80a4d0732c5f26db SHA-256: da213f26282fa20749f56e5ea01884096a025ee56d908f215b739e63ce33bd84
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded URLs, one of which, https://baarspo.ru/123, is identified as a potential phishing or malware distribution point. The heuristic 'SE_INVOICE_LURE' suggests a deceptive content strategy, and the presence of multiple external URIs indicates an attempt to redirect the user to malicious content.

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 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
  • 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://baarspo.ru/123?utm_term=envelope+size+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385617/normal_605439ce19ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_60c0cb9dd85ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_604195839540a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6060e12609dd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_604824e22de7c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4388276/normal_60b455d1cb733.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4501503/normal_60b717d20d679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_601da5bde6e40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_600797f10d403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_606ea8f2e0e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_605509c87d22f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepaxebi.pbworks.com/f/fire_evacuation_plan_template_for_warehouse.pdfIn PDF document text
    • http://goxeguj.pbworks.com/f/nogul.pdfIn PDF document text
    • http://betosaxugawi.pbworks.com/f/vugajorevanase.pdfIn PDF document text
    • http://zilebunod.pbworks.com/w/file/fetch/144426165/60502765618.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/w/file/fetch/144524298/joguginid.pdfIn PDF document text
    • http://jinotofatum.pbworks.com/w/file/fetch/144948765/86191243884.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/adverb_clause_exercises.pdfIn PDF document text
    • http://kuduwoxux.pbworks.com/w/file/fetch/144805923/fogapigibomi.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/4547778416.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_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 4972 bytes
SHA-256: c300042b8ed5eba24e1fa77ce8b979fe801d60859c470ce045cfbaf6bc41416e
font_01_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 10824 bytes
SHA-256: 73f18ec467e5e49f9786f8febeec73de2151d0dd9aaf862fa09e9d36216d827a

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