Malicious PDF — malware analysis report

Static analysis result for SHA-256 f285c60e617e6bb3…

MALICIOUS

PDF

81.3 KB Created: 2021-03-26 08:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6a4d00a61b9e7185d7b89f47766b2b31 SHA-1: 1f48130c745690c80eb2e1677b8bc79a079e13e7 SHA-256: f285c60e617e6bb379a91da8e7a48fae3a123a917658e205dfcc058202e7a40a
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 0.9998

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/wix?keyword=ocarina+of+time+rom+hacks+reddit PDF link annotation
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/dumufin.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/78697cdc4d79.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/ijggigT/3669304479.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jffo2gj/ball_hitch_for_cub_cadet_lawn_tractor.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/UjegjoM/jarak_mimpi_basah_normal.pdfIn PDF document text
    • https://xabetibupu.weebly.com/uploads/1/3/0/7/130738966/rulonez.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/ghdgjgg/wufiruwaramatosaka.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/zutimabuzo.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/aca899.pdfIn PDF document text
    • https://fegafedanopi.weebly.com/uploads/1/3/4/3/134311678/668155.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/6663863.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/rafedepid_jawofezuvib.pdfIn PDF document text
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/fobugekupevo-zasunexafikanik-bobezoram.pdfIn PDF document text
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/ce0281047.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutaturusix.myartsonline.com/piscicultura_ornamental.pdfIn PDF document text
    • http://gegavolaful.epizy.com/interview_definition.pdfIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/marriage_biodata_sample_download.pdfIn PDF document text
    • http://dapukagizepor.rf.gd/37939609836.pdfIn PDF document text
    • http://begafunif.epizy.com/tedazopokeximi.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_off0000ff53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF53 5320 bytes
SHA-256: c5d42d02cea59795586de950619eac8d17b1f45076a2d66675f669f7b8643ebf
font_01_sfnt_off00011143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11143 11144 bytes
SHA-256: e8aa8e7c9b7a598b4cf12b72933d29cd526d3e84370dc8ae490dd80af7dbefde

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