Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ed6215f884e9ab…

MALICIOUS

PDF

61.8 KB Created: 2020-11-18 20:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d81eb7dc291a213a6488c22e132ae854 SHA-1: 50f28b06e378b152b779a05b86c09681d2d9effd SHA-256: 00ed6215f884e9ab43e74d316f1ff7511c944ed3fdeb3f8693163b7e7f0feab8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'traffnew.ru', indicating a potential phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=axial+and+appendicular+skeleton+labeling+worksheet
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fa7ca1e253b8.pdf
    • https://cdn-cms.f-static.net/uploads/4414688/normal_5fa3e7f8db234.pdf
    • https://cdn-cms.f-static.net/uploads/4416669/normal_5fac5ddb50beb.pdf
    • https://cdn-cms.f-static.net/uploads/4421630/normal_5fa781f1cd817.pdf
    • https://cdn-cms.f-static.net/uploads/4414677/normal_5fa60ad61b869.pdf
    • https://sotemukolewidiv.weebly.com/uploads/1/3/4/6/134660154/3263358.pdf
    • https://cdn-cms.f-static.net/uploads/4427282/normal_5fa023b18f527.pdf
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/funigolepenonako.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f907a2ff1101.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1f0c6712-f6fe-4d4e-a852-344dcdf6e288/85588101770.pdf
    • https://uploads.strikinglycdn.com/files/8ce6bc88-9c89-4db7-85c1-8fad9f01cd48/19436008801.pdf
    • https://uploads.strikinglycdn.com/files/731995e0-1ae3-46e0-9116-d00d709a1765/cayuga_county_arrest_warrants.pdf
    • https://uploads.strikinglycdn.com/files/a8485b31-adff-48ae-afee-c7d610b7a700/zezemive.pdf
    • https://uploads.strikinglycdn.com/files/ab88dfd1-1e5d-423a-9182-ba2ec8ce94b0/botanica_forestal_libro.pdf
    • https://uploads.strikinglycdn.com/files/8d7e4dd9-2666-4903-ba3c-38555da27e84/triamterene_side_effects_sweating.pdf
    • https://uploads.strikinglycdn.com/files/3134e898-4c1c-4438-9045-62b0fc270682/28271494729.pdf
    • https://uploads.strikinglycdn.com/files/aff65939-39a7-4b30-8229-4460d05e3698/96443831960.pdf
    • https://uploads.strikinglycdn.com/files/2546d24d-70df-4613-abf2-f1bd9161d264/wazikov.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b979.bin
bc995667294eb731504ad947ad34918d17ffb480600b2ed66411514f97174f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB979 5688 bytes
font_01_sfnt_off0000cce2.bin
678d041bd2eddd5ee130f585aa367e6569dcfa0c4aefc2323bf8d2cadc21838f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE2 8448 bytes

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