Malicious PDF — malware analysis report

Static analysis result for SHA-256 daad47cfe4602942…

MALICIOUS

PDF

70.7 KB Created: 2021-01-01 04:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb99b7f2f8e6d1dc393d13367cdf723e SHA-1: 1102e8f58607a9a9d4f512f3388e367fc8dc36ab SHA-256: daad47cfe4602942728193e2abafe796251d39b33855a4493cf14b74b4ee90df
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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://traffine.ru/strik?utm_term=stick+tennis+tour+hack PDF link annotation
    • https://cdn.sqhk.co/vapezuwe/TCie9ia/claw_machine_prize_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/cihwbSa/gmail_sign_in_new_account_create_free_now.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/8055268.pdfIn PDF document text
    • https://jevilurusev.weebly.com/uploads/1/3/4/7/134749577/315652.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/XjoYBFY/67163435444.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/132baa5e-e4b0-4ea7-940e-7d8ffe16e72a/37894863983.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/pakigiwuketiwuvil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb238abc-9423-4913-8504-d41c40c71d6f/xapotazipubukusoxuwepile.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/60112073609.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/gabije.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/access_patient_visit_hospital_database_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/easy_friendship_bracelets_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/chosen_hill_school_new_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a2c089-c793-4705-b2f0-f0947339539a/mini_racing_adventure_mod_apk_1._17_4.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 5024 bytes
SHA-256: 23344fc63fbc974dfdc89edeb54e6bbdf5f3b07b06eee12d5876d0bf31dbc327
font_01_sfnt_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 11428 bytes
SHA-256: 02dc8259607fab0b09ddabb29e5966f6bb1b865d710433e4eb9f84b848f6c51e

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