Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c7203447a0ca42…

MALICIOUS

PDF

81.4 KB Created: 2021-06-06 22:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0ee93c2f4275c9d129d19863b409936e SHA-1: 694239bdfac0e262db648cd368389a851f468baa SHA-256: 44c7203447a0ca424ff227b77a6d0e7d059f70117ffc00359ec3a6ddafcc9f8f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest the document's primary purpose is to redirect the user to the malicious URL, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drafthe.ru/pbw?utm_term=how+to+use+tiko+voice+changer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373519/normal_601b35d73fa9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369328/normal_5ff5ce589b014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5fdba52def1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_6012fc6a511e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_606d969100ad9.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/430dda52-ded5-408f-94f3-bbb876003d79/2385302369.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144413559/27295611233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aadade9-bfdc-440c-b00f-de2046fcc586/soundarya_lahari_telugu_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5657b173-1bd6-4a29-b0e8-02af4d582f63/vijexisexuwosobitad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d31884-98c9-483d-9793-d6a0bc705d8d/wujag.pdfIn PDF document text
    • http://favixose.pbworks.com/f/zugovag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca1cb55-11aa-49f2-8dd5-fee4be094f05/57751659634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28841b8-8191-4428-b1d9-1039d49f8213/the_last_song_full_movie_free_no_sign_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a550cb1b-2292-48e7-b47a-08386818ae1a/4852604852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c583776c-920f-49b0-97b0-0798cd245aaf/learn_english_speaking_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d12fcc4-c735-4a40-b699-9fc178bfdb16/meduv.pdfIn PDF document text
    • http://bopidix.pbworks.com/f/pofowezawodasimuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f55ed9e-5b44-4329-bccc-7f03bd9bd18a/firezekijujiwamoridij.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_off0000d9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 5204 bytes
SHA-256: 85c5948544cc4466c3cbe3e003e8df28f0a001d3b20c0ccd2ef209e888121c53
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 11868 bytes
SHA-256: 5c6c2fdc634297e077f66a754112d55f65c012c86280c05f330934f63007cf33
font_03_sfnt_off00011c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C51 17464 bytes
SHA-256: 2a63fa2ae1920aec677f988b561b593b480dc918b18f0ec95b5ad9e21a1de713

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