Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc166a3e93b196c8…

MALICIOUS

PDF

90.3 KB Created: 2021-04-23 06:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a6ba73aa63459d659443ee62f1f7767 SHA-1: 7acbe8f9cf5285685aff9c60486ed4d21e77874e SHA-256: dc166a3e93b196c8fd1a29b86020d9a95519ee94e3809eb46bc9c4273f6ab80e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI within the PDF content suggests an attempt to lead the user to a malicious resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=learn+to+draw+cartoon+christopher+hart+pdf
    • https://cdn-cms.f-static.net/uploads/4457570/normal_602d95f2b1846.pdf
    • http://bunnygummy.ru/danielle_steel_paperback_release_datespecv4.pdf
    • http://wedipum.mygamesonline.org/balance_of_power_international_relations.pdf
    • http://dufifudusimube.mygamesonline.org/jurnal_perilaku_altruisme.pdf
    • https://static.s123-cdn-static.com/uploads/4410985/normal_6005bbf370722.pdf
    • http://fotonagosuslugi-01.space/www_pcsmastercard_com_rubrique_mon_compteiy318.pdf
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5feecfef89330.pdf
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fe10aa1713c6.pdf
    • http://prizinsta365.website/tebifugurakepuninupixdeft.pdf
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5fe7879b6de72.pdf
    • https://cdn-cms.f-static.net/uploads/4412164/normal_60134d0f82487.pdf
    • http://letgtma.bid/685964922991ne48.pdf
    • https://cdn-cms.f-static.net/uploads/4451376/normal_6036d997c1c6b.pdf
    • http://auto-fishing-rods1.club/lexus_ls400_workshop_manual_download8vbna.pdf
    • https://cdn-cms.f-static.net/uploads/4377120/normal_603c586dd3122.pdf
    • http://libutulidux.medianewsonline.com/718_cayman_gt4.pdf
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5fd66b7b5a742.pdf
    • https://cdn-cms.f-static.net/uploads/4403681/normal_6039252047227.pdf
    • https://static.s123-cdn-static.com/uploads/4494657/normal_5ff653466bc54.pdf
    • https://cdn-cms.f-static.net/uploads/4374211/normal_60230fb5692bc.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bomapogixojepo.epizy.com/english_padhne_ka_tarika_video.pdf
    • http://fekejuw.atwebpages.com/simple_definition_of_electricity.pdf
    • http://komeguvupide.epizy.com/magnus_chase_and_the_gods_of_asgard_book_2_the_hammer_of_thor.pdf
    • 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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011bfd.bin
79a5d7f1ce06d6cbcd669da360c3c603fa43c0237b90ed7236819bfd9a873014		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BFD 9196 bytes
font_00_sfnt_off00010a1d.bin
78f00cbd2d015caef29466f1f990dceeb170c08cfb53cc871d057fab26c70164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 5244 bytes
font_02_sfnt_off00013623.bin
b099872f87eeacc861481c5bc0cd8e95ad46201285e96b8cb03bbc70731801d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13623 10740 bytes

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