Malicious PDF — malware analysis report

Static analysis result for SHA-256 e230e50a26772e24…

MALICIOUS

PDF

92.8 KB Created: 2021-05-30 21:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4f59ac0e7febcde4119dc11bf6184373 SHA-1: 14b6ab029217bf40ae67862a2b0c264c03d41528 SHA-256: e230e50a26772e24f49b95f29b937610c69d6d64a7155734f77bfbe2562a0f93
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, identified as a link farm. The primary URL, https://mezovuduw.ru/strik, is suspicious and likely serves as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://mezovuduw.ru/strik?utm_term=spartan+firefight+cheats PDF link annotation
    • https://dikafusit.weebly.com/uploads/1/3/5/3/135304370/7640948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_602892be8b980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_604302d23f41b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_5fd2615f195d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fdee4c7ec9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490929/normal_603ef648cd7f2.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/lumekixegesugixuxo.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/0583101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447252/normal_604f3976af0ae.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/1198297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ef3041-596c-4374-96ae-1d0e77bb8b56/delonghi_rotisserie_convection_oven_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce8dc1e-c2f2-4457-8e61-4b6b0e2bda5e/69126374784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8342d07-979b-4d30-a440-95e5ff98bd0e/frankfort_plant_board_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7742e079-42b5-44c2-bb54-c4e789437f4d/kevazesebiwokopon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3b3815-d906-4377-bd93-2be7420d4bcf/luvebilogidivadatigaroziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53d3914-c35d-4b14-beff-79b7fac644e4/download_fl_studio_mobile_3_apk_data_full_free_cracked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed3ed47-6764-4fe7-bb9b-63dd1c37bd2b/how_much_is_a_roku_at_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5597d2f-1224-4164-a79e-620b973b0a76/fitenotefuzajuzavowomiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a66a31-3b0c-4a12-ba53-ece0f9a26856/kinematic_equations_of_motion_class_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679023d6-1d77-460a-86c0-d29fc0c8c0af/how_to_get_unlimited_stars_on_homescapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259df0d1-2193-4f6d-8332-b7c4f621e83c/9118219493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20a62d3-daa0-4693-b887-85cd4444507a/96101799519.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_off00012cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB4 5348 bytes
SHA-256: 4ef1e5b89e758cace93ccd0320780659d7e570406f13acf5e38916f00a945aff
font_01_sfnt_off00013ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE6 11508 bytes
SHA-256: db2c71bbb2f911ca62b8f4f406a8ccf4e2a5d9642d3e42fac428c72995e3a900