Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2868c001a1fc2c8…

MALICIOUS

PDF

78.5 KB Created: 2021-03-05 09:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6468b9ce90c4cd5e2bfa0ae697443a58 SHA-1: 83ed93d5a0c230d8d223031d89b2ec44d743073d SHA-256: e2868c001a1fc2c8770e5954eab892386447ef88267e0c5f1c63f84b83ae9e82
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous external URIs pointing to disposable hosting and a link farm indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=lpscience+fatcow+enzymes PDF link annotation
    • https://lenololiwi.weebly.com/uploads/1/3/4/4/134455370/rubojerat.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/f5178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5ff7895c8b0c5.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/warcraft_3_original.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/WgikJIm/renamowose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_6017a7ac6b3a3.pdfIn PDF document text
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/kojokot-xamemuluwinij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453575/normal_5ff56944bdd99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_603aafe9d3d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_6010d5ee50862.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/h4hbmNc/toca_pet_doctor_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/fpcghvP/fly_wings_hack_apk_download.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/b7c9667.pdfIn PDF document text
    • https://cdn.sqhk.co/vopiruwikil/gi3aGi2/driving_zone_2_lite_mod_apk_unlimited_money.pdfIn PDF document text
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/legalogove.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/jixazuropibodudisosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_5ff423cfc98e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_601636b42fbf2.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/giAiejh/coin_pusher_real_claw_machine_crane_game.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/82471590713.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/suxuzubojut/primary_biliary_cholangitis_easl_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/rurudavigezizefosexodiko.pdfIn PDF document text
    • http://gafodix.myartsonline.com/rudawubaf.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_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 5216 bytes
SHA-256: 508a8d5a521c34559a41585a4a0cd9897e5ec5c661e6e2aabba5cc8acf500146
font_01_sfnt_off00010781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10781 10884 bytes
SHA-256: ce0dca769f96616613aa0563820bfae559a84d9ecf9b0f7147aa90a8a673d848