Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75ab1d9cced6612…

MALICIOUS

PDF

75.4 KB Created: 2021-03-27 20:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8df7412b9c566c32c8fd091b28ae01a5 SHA-1: 9c36035555f0217a38ddf6e63191fcb740ac63d8 SHA-256: b75ab1d9cced6612207de4142c4050aa97d811ae412c24ebc4c380d56944ba57
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely the malicious destination. The document body, though heavily obfuscated, contains text related to 'Bsc nursing course details', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=bsc+nursing+course+details+pdf
    • https://cdn.sqhk.co/xupodafib/jbYihaz/63635049188.pdf
    • http://motubudasuvapan.medianewsonline.com/dipudamumugepoduxiruzuxiz.pdf
    • https://cdn-cms.f-static.net/uploads/4388427/normal_60592ede9f45f.pdf
    • http://wapividazofar.scienceontheweb.net/wuwewomijufixabitam.pdf
    • https://cdn.sqhk.co/xezexasag/Xoih0jb/zebibafoferove.pdf
    • https://cdn.sqhk.co/gekobegij/4Tu8hfs/14466560723.pdf
    • https://cdn.sqhk.co/luxixumogez/ig8hahd/draw_master_online_game.pdf
    • https://cdn.sqhk.co/riteximeras/jncXtza/rotten_tomatoes_netflix_series_ratings.pdf
    • https://cdn-cms.f-static.net/uploads/4462352/normal_603954b25148a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c2c93d0c-267d-4a86-ac88-9281a0b2957b/wulewenapux.pdf
    • https://uploads.strikinglycdn.com/files/3c519752-61cd-4f1f-ab9c-8b2d1cda8780/how_to_adjust_evenflo_convertible_car_seat_straps.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_0f7b32445c6e45c2ae241e0933615921.pdf?index=true
    • https://uploads.strikinglycdn.com/files/67bcc20b-ed97-41a0-aae1-14981d82379d/tewizuv.pdf
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_a81e91fc1d3044b2925cb440a972f274.pdf?index=true
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_ecc164156c9e4be4bc479e2a5006bb55.pdf?index=true
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_b7b716a0a28e48279ec0e8010cb61cdc.pdf?index=true
    • http://nijarigu.onlinewebshop.net/star_trek_into_darkness_soundtrack_end_credits.pdf
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_e737b18ddc134f74a2516d664b1ce993.pdf?index=true
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_b4a90b9bd5ca41f7b21a60b34bf56b2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/51a2bd17-8a6c-4616-82d2-d4530facae64/14524167438.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9aa.bin
83d54455d117a582beb70055fb8f5a3931ebf200f154eecd2cd4400ee2d0bf6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 5372 bytes
font_01_sfnt_off0000fc02.bin
4b455ba4510b7ab67caba2605212abb0f6d53caaa3bccf591f62f48caf0da7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 10708 bytes

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