Malicious PDF — malware analysis report

Static analysis result for SHA-256 769082ce72b506f7…

MALICIOUS

PDF

87.1 KB Created: 2021-06-10 08:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cb4d9c80a43ea63f277fe6ba88ebeb61 SHA-1: 3d2e5bbf3efc5bec675e2c91476032756874116d SHA-256: 769082ce72b506f70ea399a64b978fd07ec8ba0befa9818dd114dfb907297965
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'wastran.ru', which is likely part of a phishing or malware distribution scheme. The document body is heavily garbled, suggesting an attempt to obscure malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/pbw?utm_term=hack+piggy+boom PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451551/normal_60466c1eaeecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_602c60a755a36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483335/normal_6018e73e7a4e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5fcaabb2b1e12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5ffa00d091a6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_6011d345f1b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_604da0078a224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_60660035a8e16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_60449418e72db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_602ee4839d0e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_6049c2b687bfe.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/e4944696-3dd6-430c-839a-98ae9c003fac/89670085974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0464a63-472c-46cf-bd69-db1cafec499b/texokokogogabofeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21beaee-f057-49f5-bcce-b4cd78a20bc1/77993050740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4584a12-038f-4f0b-ae98-d2880eb98d73/77178859937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08beaad4-b2b7-4719-873f-1e6b4c41b1b7/replacement_beater_for_kitchenaid_mixer_k5ss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703c573e-234f-48d7-89dc-20dcb7635a00/tuletofovuw.pdfIn PDF document text
    • http://vulifib.pbworks.com/f/fozijozuvozedemetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7556a900-572e-4907-a78a-e6bcdcd2544f/icd_11_psychiatry.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144417654/novela_os_10_mandamentos_cap_60.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_off00011614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 5216 bytes
SHA-256: cb9a1d82d95a3f8daeb2d9f40681aa31c471bfb4aafa5b6e5eb5618b3e15b3cf
font_01_sfnt_off000127ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CE 11860 bytes
SHA-256: 358dc5614b9d85168da370ca81b8842f4e4befbda01e47bebf4e07791cfcb671

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