Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e55d2534150ae1d…

MALICIOUS

PDF

96.5 KB Created: 2020-11-11 01:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b1642979a9eb366075c2dce6f68207d9 SHA-1: 2641d84eda3cb51217bd6c06d4d54a896c365144 SHA-256: 2e55d2534150ae1d6213cfcffda10b9003cefa11b402ccd8576d254c6a19e184
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm distribution. It contains numerous external links, with a critical heuristic flagging it as a 'PDF_SEO_LINK_FARM'. The primary malicious IOC is the URL 'https://traffnew.ru/123?keyword=ddo+wiki+favored+soul+spells', which is likely used to direct users to malicious content or further phishing pages.

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://traffnew.ru/123?keyword=ddo+wiki+favored+soul+spells PDF link annotation
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/nowopujaxepabajiv.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/judogog.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/3f4f79309c8.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/714af.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/fatikonavori/type_b_blood_diet_food_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/willmar_public_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/probability_worksheet_kuta_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/building_construction_illustrated_ching.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/naruto_two_tails_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589b3418-307e-451a-94a3-c70a61c7c0a5/94031370243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c23c74-86ff-4b2f-8d41-421691bb373c/22686836266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80c0f82-9f52-45db-8e8e-81bc723f858e/vango_diablo_900_xp_carpet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a571f32d-7417-499e-8d4b-aa2d76de2e2f/fisegemifapizifigikag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e11df8c-0939-449d-9aeb-5d8bdec56d22/belalefis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbbf95d-7f20-4d77-822c-121876842d47/14784723027.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/megokikapuvuja.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_off00013de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE5 5252 bytes
SHA-256: 53b5fba5af1e7b002dae230b6f280b0f87e8b9c04c0355a013c2b1bff28b233d
font_01_sfnt_off00014ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF6 10812 bytes
SHA-256: aaf45136cf9def96822777297f40a2b056417f3e04a1fc04898667a05e9fac19

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