Malicious PDF — malware analysis report

Static analysis result for SHA-256 87917ef9ac5fa6c6…

MALICIOUS

PDF

75.2 KB Created: 2021-03-19 21:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebd9faa8bcda0e69ad879fd5e23569dd SHA-1: 993ec1fba0674e70f759b0e6ee5341c17e616b3d SHA-256: 87917ef9ac5fa6c6abb527e78c7d771a019a997a8355866c71a090758e8d65a7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains embedded URLs, one of which is presented as a search result for a specific PDF, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=blades+in+the+dark+rpg+pdf
    • http://foramodosug.mygamesonline.org/webetugosojo.pdf
    • http://kutatit.getenjoyment.net/logitech_f710_driver_download.pdf
    • https://cdn-cms.f-static.net/uploads/4416928/normal_604cb725f0ee8.pdf
    • http://jawazapefaxuzit.mywebcommunity.org/40489640564.pdf
    • http://xubaseki.iblogger.org/22304230799.pdf
    • http://domodip.iblogger.org/the_secret_rhonda_byrne_book_buy_online.pdf
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5ff29c770c417.pdf
    • http://sunakijabe.sportsontheweb.net/jiwujopadepajajefunij.pdf
    • https://cdn-cms.f-static.net/uploads/4422909/normal_6029ffb983041.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_cc5c8287eab348e8bc5dfd82bbf0bd7f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fb362d01-0ddb-4642-b25e-ee540f1f7d00/how_to_do_a_4_step_approach_in_volleyball.pdf
    • https://uploads.strikinglycdn.com/files/fdce00a7-bb6b-429a-a825-b269971ae947/waruselororimufu.pdf
    • http://zivexotafoni.myartsonline.com/56382496399.pdf
    • https://uploads.strikinglycdn.com/files/9fb2979a-b824-411a-a133-354f90dc21a8/mabokesorupifo.pdf
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_2e273d34f08c40f4b2c88ccec4a606e5.pdf?index=true
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_2ebd0086a2ea45a1885c850e1563afd3.pdf?index=true
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_ce3427b17ea9437e83d93b8bcf4c584c.pdf?index=true
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_ef84810036bb4b1099a308c016d6d597.pdf?index=true
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_e0f241ca51a74df0bfe5c955e565ef80.pdf?index=true
    • http://fupewazogapoda.rf.gd/55690600948.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_off0000e673.bin
f2a6a97b08a10a7f40707daa25d56c2b127ad61ae3a0f793d809a725aa38eda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE673 5416 bytes
font_01_sfnt_off0000f8dd.bin
ba3f58be50d50326c3eddd64e80442db5b7f67f264f13d1d9fe2bc80a039c6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 10808 bytes

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