Malicious PDF — malware analysis report

Static analysis result for SHA-256 216124f55216dd17…

MALICIOUS

PDF

94.4 KB Created: 2021-05-04 04:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 085480ab20af9b81917b462f4b1f0a96 SHA-1: d640f10d3680e3f40d68940f805e8114e07c52c3 SHA-256: 216124f55216dd17a462b628d2245ed969166772792a75739c9e31f46c80b90f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with a link farm and potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, suggesting a campaign to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=alana+goodman+washington+examiner+wikipedia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5ff8271fd6b2f.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/68092571477.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/guzonusav.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/kisoriroxe.pdfIn PDF document text
    • http://dutuvowori.22web.org/bhakti_image_3gp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_5fd66f7c65f97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_60353398c4be0.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/96251367668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5fe0390780589.pdfIn PDF document text
    • http://poleziw.22web.org/33986362189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_602dc710bc3d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jajoxutevo.epizy.com/58467945420.pdfIn PDF document text
    • http://wipedeposadav.rf.gd/precalculus_exponential_growth_and_decay_worksheet.pdfIn PDF document text
    • http://nodonobazusuvuj.epizy.com/active_and_passive_voice_worksheet_c.pdfIn PDF document text
    • http://rorulapuvutoj.epizy.com/brennan_manning_all_is_grace.pdfIn PDF document text
    • http://wovodijulenape.onlinewebshop.net/57914819944.pdfIn PDF document text
    • http://vesunak.rf.gd/siranaxujuzoroza.pdfIn PDF document text
    • http://jexunon.epizy.com/woginozigezuvura.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/20876547010.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12462 5376 bytes
SHA-256: 1b2c28878c5c43e1b15d348dc62386aed905fc7ed56cdfce0589cf13ea8cc394
font_01_sfnt_off0001368d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368D 11620 bytes
SHA-256: 686bf0e570a3c46784adb773ad124700bb6817b87cce2c92682d5f5e202eacdd
font_02_sfnt_off00015e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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