Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59a40952174f383…

MALICIOUS

PDF

76.3 KB Created: 2021-03-31 11:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cd37e4f56bce3f1643364cee06b3c315 SHA-1: 9a487ce7405e16bd6b654f80df44c1d3ad296ac3 SHA-256: f59a40952174f383b869ee6854db1b636ee99c1ae08b677cfb22f9d546bf94bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9993

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://vilenefex.ru/award?keyword=shoulder+bodyweight+exercises+pdf PDF link annotation
    • http://juzufezike.mygamesonline.org/xibazimapozola.pdfIn PDF document text
    • http://jabodaligononu.iblogger.org/excel_para_analise_de_dados.pdfIn PDF document text
    • http://farvestnn.ru/86181544227914ju.pdfIn PDF document text
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/fovibisojoz.pdfIn PDF document text
    • http://zavutuwifuwe.iblogger.org/my_pet_veterinary_clinic_san_gwann.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/4443258.pdfIn PDF document text
    • http://dreabling.online/meade_lx200_12_acf_telescopeguuqp.pdfIn PDF document text
    • http://vpntop.info/pidegewubowevasifh3eh8.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/27784044699.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/dexijir.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/what_machines_to_use_at_planet_fitness_for_abs.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/4145365.pdfIn PDF document text
    • http://pilagapub.iblogger.org/falis.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/best_biology_notes_for_ssc_cgl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojadovupi.epizy.com/91345764066.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/ca_cpt_material.pdfIn PDF document text
    • http://winefop.epizy.com/how_to_search_a_on_ipad_pro.pdfIn PDF document text
    • http://dabixuri.rf.gd/sonata_pathetique_piano_sheet_music.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/fafuzejo.pdfIn PDF document text
    • http://disoluje.myartsonline.com/nerumew.pdfIn PDF document text
    • http://fegozovot.rf.gd/attestation_de_formation_uber_montreal.pdfIn PDF document text
    • http://dijijesuwaxon.epizy.com/rusod.pdfIn PDF document text
    • http://muzobun.rf.gd/craftsman_mini_tiller_fuel_line_replacement.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 5712 bytes
SHA-256: 63639214fb0d3de8ef87b2e647aa1734f188d00b0ce690f450b55aa62d111626
font_01_sfnt_off00010144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 10096 bytes
SHA-256: 0ac25e2b7d9a2423a537abf8d350a49dd8be56b736ffb44cdb73a8d29c47e8ca

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