Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6edf9622b2d7081…

MALICIOUS

PDF

89.8 KB Created: 2021-03-01 02:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a2c16527524ba083d07e72b52ba31e65 SHA-1: 33720c8c051277439b0f7d136f7620ed11487021 SHA-256: c6edf9622b2d708152dcea446e46e776dfd0e4047566c3f209a1dfda3f44abb0
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly the one related to a search query, point towards a social engineering tactic to drive traffic to malicious sites.

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://baarspo.ru/aws?utm_term=does+home+depot+carry+honda+generators PDF link annotation
    • http://prequester.online/metezor033om.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/77881ee0c6ea.pdfIn PDF document text
    • http://babbieshop.ru/majasevapekeponamislxkq8.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/vumimaberakevodunuw.pdfIn PDF document text
    • http://anarchymedya.com/small_talk_chatbotcu2xr.pdfIn PDF document text
    • https://xujesosa.weebly.com/uploads/1/3/6/0/136090165/4669523.pdfIn PDF document text
    • http://mon-cmbretagne.best/mimefaxodawvlbl2.pdfIn PDF document text
    • http://punejew.mygamesonline.org/99022988587.pdfIn PDF document text
    • http://prostotit.site/le_pdicule_pulmonairezy34k.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/15240768199.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
    • https://s3.amazonaws.com/zamuriza/one_piece_bounty_rush_25300_mod_apk.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/3556828899.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/bufituzujulilapogutiwakef.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/gusexel.pdfIn PDF document text
    • http://vatimofaxemog.rf.gd/election_definition.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_off000113ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 5296 bytes
SHA-256: d58810dc8ee9f63ca1b6ac3cefc4f7d990696cb268b77cb270e0760722a161c4
font_01_sfnt_off000125c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C9 11224 bytes
SHA-256: d9e2bcae3e806dc2e4b7a8a7cceacfda3e3c811d60827ca5eae56c36e7abf098
font_02_sfnt_off00014bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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