Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fba98789d52402f…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 20:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 14b8dd77f27acfb737500a7f5db4ca9b SHA-1: 8eda0744ef373d036ff00cddd2632871ff757fbe SHA-256: 3fba98789d52402fe335f68f273fd851cd9e69851160319add7011572728681c
186 Risk Score

Malware Insights

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

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 0.9997

Heuristics 6

  • 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.
  • 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/strik?utm_term=kitchenaid+professional+600+pasta+attachment PDF link annotation
    • https://cdn.sqhk.co/lowanivari/hjrihjg/aquatic_scourge_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fixakozumad/cjidhcN/direct_line_group_annual_report_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/TENgdiC/mukipovoraretifezamol.pdfIn PDF document text
    • http://buvevolu.iblogger.org/32935614969.pdfIn PDF document text
    • http://megalit-korolev.ru/circuit_diagram_of_power_transformerg08uy.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/algebra_age_problemsm2b28.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/nWv5P4j/anita_anita_telugu_song_free.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/zunomixobometa.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/90a3e23a.pdfIn PDF document text
    • http://gawaxoxirerefi.22web.org/berurunu.pdfIn PDF document text
    • http://shopyou.online/how_do_you_troubleshoot_an_electric_golf_cart_motorjk8qx.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/c7547b1d13a.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/xitamajesowe_givut_jizemupox_dijewiliwur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tarajix/media_creation_tool_windows_10_usb_format.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/100_startup_review.pdfIn PDF document text
    • http://mixeduteni.epizy.com/arduino_uno_pinout_i2c.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/heroes_5_campaign_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/gegatanuvaze.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/star_trek_the_next_generation_season_2_episode_21.pdfIn PDF document text
    • http://rupemogevewis.rf.gd/charter_ref_code_s0900.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_off0000f137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF137 5660 bytes
SHA-256: 7d68443128ea649dd4bdc6a48df74428fb8d121fe480552d3419bff75443333a
font_01_sfnt_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 10928 bytes
SHA-256: a1e59723bd0b70149f91bd367dcfec36912964221d92b676c4dc6297c132cb7f

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