Malicious PDF — malware analysis report

Static analysis result for SHA-256 737247026b03b583…

MALICIOUS

PDF

61.4 KB Created: 2020-11-21 06:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4903f1e3d44346916fa1e55f050d714c SHA-1: 7644b97723304e341422b5dde1af426b5f67f5ff SHA-256: 737247026b03b583396e2be1f8e0759caa66b081483808835810089e2719bf6a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://traffnew.ru/aws?utm_term=smooth+operator+bass+pdf', suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://traffnew.ru/aws?utm_term=smooth+operator+bass+pdf PDF link annotation
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/7a015d.pdfIn PDF document text
    • https://kawigijutugin.weebly.com/uploads/1/3/4/3/134351661/kutixukuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5fb5f1918b110.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/1fc65aef-7ef0-431f-9cc5-a0ad3d52241a/ludozowojama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee59b538-f9f6-4503-9b0f-3439f9429cff/zudifesumamuniw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9c7837-baf4-4d56-9013-08dc93a77827/l_histoire_commence__sumer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59ea324-4a21-405a-bf63-c13f5b769b81/siemens_simodrive_611_fault_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff12fa5e-4098-4318-9b40-8b4bcaf13e02/3874317136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85415e02-083a-445e-a96e-3624fd51245e/16787893956.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/maximum_power_xl_male.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3928afa-0bad-4a79-9aaf-d0c92b9884db/all_edges_in_savage_worlds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b749cc-7772-4f02-a303-6e5578d9e8f4/34210443222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf8b15d-4794-43bd-b206-f8c0de62ccf8/xawuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040f0383-b401-462f-9697-6866537e2fbc/17412304926.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_off0000b3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FA 5492 bytes
SHA-256: f4ed105d0d082345ba3d4791a22cca411ffb91ac5b4e76b69a33ffb7c9ba24a3
font_01_sfnt_off0000c66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66D 10296 bytes
SHA-256: df0d56923b301fc563f8a8549fd5b85f7822f7aea19cb875b2f4838f0a8d37a7

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