Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02e6acb9d5636d3…

MALICIOUS

PDF

83.0 KB Created: 2021-03-09 02:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5fa83641ef66123ff6cbd64844409c9a SHA-1: b00951da208a07eb7ca3abb9c190d8fef867d358 SHA-256: c02e6acb9d5636d3871bab8935a459dc01311d205078fd73b829bcd5ab132685
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file flagged as malicious by ML classifiers and ClamAV. It exhibits characteristics of a fake CAPTCHA or human verification prompt, designed to deceive users into executing commands or performing actions. The document contains numerous embedded URLs, including suspicious ones hosted on disposable domains, suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://leonvi.ru/123?utm_term=facebook++data+from+page PDF link annotation
    • http://degimogug.mypressonline.com/baby_bjorn_carrier_newborn_youtube.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/dnd_5e_warlock_expanded_spell_list.pdfIn PDF document text
    • http://konolux.medianewsonline.com/lotro_promotion_points_2.pdfIn PDF document text
    • http://sedouche.xyz/28188097647s81ov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5fcb671c596b5.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/8728090280.pdfIn PDF document text
    • http://groby-ritual.online/garmin_gns_430w_software_update0cj30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465930/normal_6035d8e9cc3c5.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/automatic_transfer_switch_operation.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/mastering_the_art_of_french_cooking_volume_2_recipes.pdfIn PDF document text
    • http://madewithsunshine.com/plantilla_para_hacer_un_plan_de_negociosl2oo9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5ff009f730ee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5fdab1f7230ac.pdfIn PDF document text
    • http://santaparker.store/69011805969jecn8.pdfIn PDF document text
    • http://peludofnor.fun/california_parental_leave_requirementsqgzb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_49e7579842b546ffad50ddd7a8a39706.pdf?index=trueIn PDF document text
    • http://xowobovu.myartsonline.com/ziwepalemexojam.pdfIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_bc1723d523d340e084c164e27631a7cb.pdf?index=trueIn PDF document text
    • http://baletax.onlinewebshop.net/customer_service_representative_job_description.pdfIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_c4eb9250db8f4e6daa8d58af48049a1d.pdf?index=trueIn 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_off000107ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 5424 bytes
SHA-256: 15dd66cb7c9ce80cb915aa57b205c5a570b88d99773c4a6815edd0875de44080
font_01_sfnt_off00011a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0F 10880 bytes
SHA-256: f9d1519f5d2e1304267d389ad685037e73d39852c9b5ed5c6ceb5339ccac1d50

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