Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cef066f6db992d7…

MALICIOUS

PDF

66.0 KB Created: 2021-03-23 12:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b944c8362ab56dc426e2564bdd22f40b SHA-1: 1864dee73ab5f5281f0cea06506c5ea29c8ad91c SHA-256: 6cef066f6db992d7785af100532fba24950fb60eeae27732793612d7713374c6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of external URIs suggests the document is designed to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/aws?utm_term=mainstays+bathroom+space+saver+assembly+instructions
    • http://zujejilolo.scienceontheweb.net/96627147697.pdf
    • https://cdn-cms.f-static.net/uploads/4489255/normal_6038c4fc5f8e8.pdf
    • https://static.s123-cdn-static.com/uploads/4409801/normal_60045b83a4e15.pdf
    • http://gsmall.space/big_ideas_math_red_accelerated_answer_keysok51.pdf
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5fcdf393c251d.pdf
    • http://anrostore.ru/firepower_4000_datasheetlzxq5.pdf
    • http://graatorama.space/87373687858rvh82.pdf
    • http://larts.digital/bunny_live_mod_apkpurearuay.pdf
    • http://larumutul.getenjoyment.net/gaturopadigokipo.pdf
    • http://motarojetox.sportsontheweb.net/brother_ls_1217_extension_table.pdf
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5ff08c6271cd6.pdf
    • http://7evenrp.ru/735727017e6g9y.pdf
    • http://giwitijudaleka.mygamesonline.org/macbeth_act_2_quote_identification.pdf
    • https://cdn-cms.f-static.net/uploads/4499958/normal_5fd7f5d35c41b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bitines.myartsonline.com/fidadimetateletonisizojo.pdf
    • http://besafetusupug.atwebpages.com/livro_segredos_da_cabala.pdf
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_e270a5fa12eb4a9a94a997520b90eea7.pdf?index=true
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_881ddecec46849eeb408ed033188e755.pdf?index=true
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_56118605c75942bcb7135a159e617fee.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4af.bin
0fe8bbe2112b0a0bb197e68e0a45aff0992c01c68726dc0fe1278ff5039cc32c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AF 5480 bytes
font_01_sfnt_off0000d73c.bin
67ce6c4491fba49de2b61ff8f0f4abe0e4df6cc2f353070d3b3499360de63d49
pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 10288 bytes