Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd87e6e651314cc…

MALICIOUS

PDF

77.0 KB Created: 2021-03-30 17:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 02f5125465c1f8a092b6d4c0f8e1ad08 SHA-1: b02a3a0fc838be002020d8211d49efcdf53397ca SHA-256: 5fd87e6e651314ccc78650901ab15d96816559a632e96ca68cac3b89b7d6290d
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://soxebez.ru/wix?keyword=ppap+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/ximegawaso/gesijkX/rolusemet.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/gihaghb/rise_of_kingdoms_lost_crusade_advert.pdfIn PDF document text
    • http://detonic-italia.website/519660933161qgc.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/wotefi.pdfIn PDF document text
    • https://cdn.sqhk.co/xawowatu/avRYQXj/clash_of_clans_unlimited_troops_hack_download_apk.pdfIn PDF document text
    • http://abreudesigns.com/18989289755zj7zx.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/msiegcm/super_mario_kart_game_over_music.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/yvijhba/88368499478.pdfIn PDF document text
    • http://mediaverifiedbadge.com/where_is_distributed_computing_usedx2mwv.pdfIn PDF document text
    • http://instas.site/58320087446vneyr.pdfIn PDF document text
    • http://wacc-cat.org/57440349617euv8u.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/wepawe-pewopiva.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/jivuza.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/rTjirRi/retrograde_motion_of_planets_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/heOjegg/free_printable_mini_golf_scorecards.pdfIn PDF document text
    • https://jaxipalat.weebly.com/uploads/1/3/4/7/134746428/d931587f8cb2f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/topipovikapari/btec_level_3_performing_arts_business.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/22035776758.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/how_often_should_i_change_the_transmission_fluid_in_my_2012_honda_civic.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/81233755699.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 4488 bytes
SHA-256: 84b08cc4717c9d85e795230c35248c517f51831222b2be0ec66d038494a020e7
font_01_sfnt_off0000f4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B7 10720 bytes
SHA-256: 9aa9fcbbc645ea75b750e84eeb1d5beac1b956b3a872048ecb623679848b0a71
font_02_sfnt_off00011911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11911 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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