Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b037cd46942b3f1…

MALICIOUS

PDF

88.1 KB Created: 2021-03-16 12:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f8945124f127316e742e39560b3680 SHA-1: d092e4310ac1dddef898df92ada4c1b0b7180b76 SHA-256: 9b037cd46942b3f1cc8359351e2af41479b275ec63ada0584b199af23dda11ea
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with the primary one being 'https://jottigo.ru/award?keyword=cell+organelle+chart+pdf', suggesting a lure to download further content. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/award?keyword=cell+organelle+chart+pdf
    • https://cdn.sqhk.co/gazegarov/ifRbBnb/phone_number_hacker_simulator_online.pdf
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/fabawetudatopov.pdf
    • https://cdn.sqhk.co/wuzufoxo/idaUFgi/tesuzololiribafufiwe.pdf
    • http://priz24.site/682441622066ud1w.pdf
    • http://invitesistem.ru/has_tales_from_the_loop_been_renewedzafa2.pdf
    • http://lnstagramverifiedsbadgeforms.com/11101369373rykyu.pdf
    • https://cdn.sqhk.co/kanedufopuma/V3jg9Yx/71170706478.pdf
    • https://zatofurepodato.weebly.com/uploads/1/3/1/4/131482853/1143769.pdf
    • https://static.s123-cdn-static.com/uploads/4421209/normal_5fce6c28d5396.pdf
    • https://cdn-cms.f-static.net/uploads/4381083/normal_6028fe235763b.pdf
    • http://epipog.com/is_taco_bell_fresco_menu_healthyzz2ct.pdf
    • https://cdn-cms.f-static.net/uploads/4493549/normal_601da3d799e57.pdf
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5feb9f943f261.pdf
    • http://samettemiz.xyz/what_qualifications_do_you_need_to_be_a_first_responderc4xqu.pdf
    • https://cdn-cms.f-static.net/uploads/4383917/normal_604eeded5f1b7.pdf
    • https://cdn.sqhk.co/jakufomego/idQgiBM/letterboxd_top_250_horror.pdf
    • https://pelozaxuji.weebly.com/uploads/1/3/2/6/132680784/rurevabuwojemep.pdf
    • https://cdn.sqhk.co/mizopopowaze/jgqpzid/77168189518.pdf
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/rogubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4e352d37-ca4a-4226-8d7f-7b6cf50f8750/77305119816.pdf
    • https://uploads.strikinglycdn.com/files/35c6eb1f-91ff-4633-b909-9a8c14be1021/the_maze_runner_1_movie_summary.pdf
    • https://uploads.strikinglycdn.com/files/8bfa363b-c64e-4506-80f9-c8478c9aece7/shimano_ultegra_di2_upgrade_kit_triathlon.pdf
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_15b04444797549a08a215f146665bffe.pdf?index=true
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_5dc8042c2e3d451f9fea4beaf524cdb3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ec330a43-359d-4ec0-864a-06355dc22e07/12291672063.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_off00011b49.bin
7b207aa439f9264412119659625b947ad5d4d7f17c6151f20fd9a79a26eb8b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B49 5144 bytes
font_01_sfnt_off00012cc1.bin
3f7c7506e18e835833e4009b2e03569199e500619881ef1e25c0848fb26c0523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC1 10604 bytes

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