Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b508b48570a6c9b…

MALICIOUS

PDF

82.1 KB Created: 2021-01-06 03:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6971f2360c3441268413a40d4d3d54bb SHA-1: d217f75e673bee378822fc8b1c53ecadca68ab4c SHA-256: 3b508b48570a6c9bd00b05bf334dd9f8218a45c3f2010ef44100369e3acf9b02
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one pointing to 'traffset.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://traffset.ru/aws?utm_term=browsec+vpn+for+windows+10 PDF link annotation
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/jokasekote-mosaxata-zizudajigowaf-makonirisapuper.pdfIn PDF document text
    • https://tulejimukun.weebly.com/uploads/1/3/4/3/134399478/2e86d8c9c3c8a2.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/cebfa3439d.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/8245323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/toguvaju/six_sigma_yellow_belt_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0516049b-115f-455a-918a-61dcb42c582c/95892379722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa46417-ad8b-496f-b7f8-3d80f4d8b41d/13066218119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a14055c-f286-4fc3-9a4b-8243cf8a4849/wowefevolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155e396b-0e43-4003-a5c7-433a65237f1e/jikofog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7797a3f4-de15-46bd-96e5-bbbde1478e93/31076024298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0cab7a7-b3a8-4820-be0e-d341737d1a65/ulala_idle_adventure_gladiator_build.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/ivory_platform_wedding_shoes_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/brche_multiplizieren_textaufgaben.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 5008 bytes
SHA-256: d7c6e54bb08b70799d4a4bbbb6bc1507b654d2345821c702427238ef98bf8c4f
font_01_sfnt_off0000f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 11088 bytes
SHA-256: 034ae60443badb9a72245902165ee78e5ccf87bc37176d33a75a7d5336bb5d22
font_02_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 16132 bytes
SHA-256: 4f6d6443d667672870c38ce4e1d364e29e61a0df6fd2d8217a47270b9fff04c9
font_03_sfnt_off00012cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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