Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6d20509f951204…

MALICIOUS

PDF

71.7 KB Created: 2021-04-14 22:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c574b9a36a05aba31a52e848b330505d SHA-1: 9b029ab165cb24c5baf72627ba79ca9ed0a765c3 SHA-256: ee6d20509f9512047f60c5659a50cd863d5e72f318392d1a8371bb05a60be630
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/strik?utm_term=2015+international+prostar+warning+lights PDF link annotation
    • https://cdn.sqhk.co/videgogaf/ghes4pE/bomejiditexawarit.pdfIn PDF document text
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/kaputivibobod.pdfIn PDF document text
    • http://amandeepsadyora.com/grammar_checker_app_for_androidlly94.pdfIn PDF document text
    • http://fesaniru.iblogger.org/best_cordless_phone_for_vision_impaired.pdfIn PDF document text
    • http://fullhp.info/pop_mzik_tarihi_slaytcb2x7.pdfIn PDF document text
    • http://bluebadge-support.com/rokamujepopojebamitigunnvi8.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/titadudk9kca.pdfIn PDF document text
    • https://roxowuvunesoneb.weebly.com/uploads/1/3/4/8/134889799/1034430.pdfIn PDF document text
    • https://dojudetokin.weebly.com/uploads/1/3/4/6/134613144/e72a1.pdfIn PDF document text
    • http://pezuzifofuxi.iblogger.org/23144589607.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/nutifood_vietnam_annual_report.pdfIn PDF document text
    • https://lonexababite.weebly.com/uploads/1/3/1/1/131163854/f01a766.pdfIn PDF document text
    • http://reborasiruv.iblogger.org/schizoaffective_disorder_bipolar_type.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/didhbia/dujatexon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_2b42c91a0c234602b455a74a4e286ef9.pdf?index=trueIn PDF document text
    • http://lavuradisaxel.epizy.com/sodium_in_taco_bell_crunchwrap.pdfIn PDF document text
    • http://baxovebiw.rf.gd/citizen_gents_eco-drive_titanium_wr100_titanium_chronograph_watch.pdfIn PDF document text
    • https://5f011261-9fc1-490e-aa6c-963661660ed5.filesusr.com/ugd/b5472a_63c7fb3f2a914bb494fc4e799b69c565.pdf?index=trueIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_bc5e84d658704ff79a9efebeff8a82b7.pdf?index=trueIn PDF document text
    • http://mijitililifi.epizy.com/bangla_to_english_translation_book.pdfIn PDF document text
    • http://tonesovuxor.rf.gd/powered_parachute_flying_handbook.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 5528 bytes
SHA-256: 5e154be712fff93d143c6de31b6d6771bfcbcca3ae7aace72911e0b12f12026d
font_01_sfnt_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 11204 bytes
SHA-256: 1a2e4f39b7041b8b063d694d4fbe852b675f71d45315d5540b37a3c6c36370ea