Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fb8057ce808ec9…

MALICIOUS

PDF

68.7 KB Created: 2021-02-01 20:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee38015a041ec74d285d3eb5249e87fc SHA-1: 136cf932ea6fa40aab01f84c2f42a908a7ea8c55 SHA-256: 44fb8057ce808ec94a5d189f3a916e418ec67e227043c15f06a530f0153df8a2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to software downloads, aligning with phishing tactics.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/wb?keyword=msi%20afterburner%20download%20guru3d In PDF document text
    • http://tehnotop.store/pokemon_go_friends_gift_xpr6bz0.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/gcNWhi9/98268732367.pdfIn PDF document text
    • http://hamsterbig.com/xiwaxakafetesorrmy9.pdfIn PDF document text
    • http://aycotoro7.xyz/396506118581mhdw.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/ggJ1Ijf/robux_counter_free_robux_unlimited_counter_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5ffe14d9d43a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454287/normal_6005170ed4f08.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/jhjjjj1/gejazafafawixobebasavizal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fd2678e0ffc5.pdfIn PDF document text
    • https://cdn.sqhk.co/xabovalizo/zihU0cF/723547773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388412/normal_5fe53dd387af4.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/hu3ie77/xbox_cloud_gaming.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403819/normal_5fffbe116a9f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_600b47bf33fd2.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/0dheeSh/57285182083.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD1 5476 bytes
SHA-256: 74e7c277952ee783ad450b8bf06bfd78a2d20e374b5737a443810978a53691f5
font_01_sfnt_off0000e2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 10360 bytes
SHA-256: 1ec43b99d526798c0ce636eecba96fdd38452f25eab97ebcf8644e94319f8f49

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