Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec543a6566850a7b…

MALICIOUS

PDF

70.2 KB Created: 2020-11-26 03:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8e7b506ad2b988f60cc09a0fa77da1f SHA-1: 5e9d1e30c1d6e3bac155d1c032a30dbc774cc201 SHA-256: ec543a6566850a7bc903096958f605d0687f2f6bcd7a70559b370fc13a7eef21
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF SEO link farm, with one primary malicious URL pointing to 'traffking.ru'. This suggests the document's purpose is to redirect users to potentially harmful content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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://traffking.ru/123?utm_term=heart+in+hand+lower+greenville
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/kebukesa.pdf
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5f9b20feb84a4.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d3659ab6-4a8e-4a73-abf2-e48fd152724b/95604037122.pdf
    • https://s3.amazonaws.com/turip/87405580352.pdf
    • https://uploads.strikinglycdn.com/files/57dcb97f-c98d-4323-af12-5dc928a74eda/75024552966.pdf
    • https://uploads.strikinglycdn.com/files/fe3aebd5-0180-4bad-90b8-700d3944c724/94795742814.pdf
    • https://uploads.strikinglycdn.com/files/ce678e39-9958-4b73-8d65-4b5a2a64bcc4/us_navy_height_and_weight_standards_male.pdf
    • https://uploads.strikinglycdn.com/files/e94a2d7a-f340-4f2d-a42c-9837b1ff8473/54206645111.pdf
    • https://uploads.strikinglycdn.com/files/50e913fd-2dad-483f-8294-d6cbbff9e71e/koguw.pdf
    • https://uploads.strikinglycdn.com/files/024708c4-d4d6-4cb1-8258-6971fd950f7a/life_after_life_raymond_moody.pdf
    • https://s3.amazonaws.com/nilititonawafim/96639945088.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca69.bin
15d767ebe7c9ef6e9cb727105131596eacaa1d076570b7da9c1a1622b813214d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA69 4812 bytes
font_01_sfnt_off0000dac8.bin
998574edd91e7373491f3a6a563ca331d82f89a3dbdfa27927d9474bc8bceef5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC8 10308 bytes
font_02_sfnt_off0000fe21.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 4324 bytes