Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29a7f56c7d528d6…

MALICIOUS

PDF

82.9 KB Created: 2021-06-14 20:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b56ff4c0f2d81db3c3683638dd5be40c SHA-1: aaaad11991ecb21e253cbdd717911aabb6f71b71 SHA-256: e29a7f56c7d528d6d685ccb3ccc03caabd9cdd2c39027ca84ad72bc89d1c3d29
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'infrive.ru', which is likely the phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'computer shortcuts pdf download'. No scripts were extracted, but the presence of an external URI and the malware detection strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://infrive.ru/pbw?utm_term=computer+shortcuts+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452595/normal_606981279cf8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_604162d75986e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60443d60e4b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fdc5d04ccfaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5ff852bc47aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_60c4b41e001c8.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://uploads.strikinglycdn.com/files/92ee9447-7487-46f2-850f-0b8d7cefa44d/buporeromovadoditus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79d67fb-94c7-49d2-b540-4ede5a076be8/bissell_1543a_symphony_pet_all-in-one_vacuum_and_steam_mop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01adfc5-a7ab-48ad-81f7-cf83207564c9/grade_3_math_worksheets_addition_and_subtraction.pdfIn PDF document text
    • http://favixose.pbworks.com/f/kaxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a876571-5dd5-4c37-90b0-7cc6420eb369/v_for_vendetta_movie_poster_original.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddaed5c5-9d2c-40ff-8f29-c6731c0bad74/the_power_of_one_chapter_16_summary.pdfIn PDF document text
    • http://fezuwiriniz.pbworks.com/w/file/fetch/145135725/51218357529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94c5c85-d85b-4ba2-a79a-400ab0c130c5/badger_insinkerator_5_reset_button.pdfIn PDF document text
    • http://fafukite.pbworks.com/w/file/fetch/144704796/flowjo_download_free_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd211691-2fb7-4e15-8cef-b4b5dede6d52/guitar_tapping_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497e9af9-a599-460e-aecf-49a0765c0aed/revetufagu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 5344 bytes
SHA-256: ed5447f1b7f0af207062deca7991ed4b134df29f8cf4662d2061b605d0854b62
font_01_sfnt_off000109e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 11436 bytes
SHA-256: ab2f04825b8ee1dd6a3e5a79afdc402c1d5262b623155a6e7765d40b858857c5
font_02_sfnt_off00012f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F21 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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