Malicious PDF — malware analysis report

Static analysis result for SHA-256 29498891fed60a51…

MALICIOUS

PDF

75.1 KB Created: 2021-03-18 11:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39145e9ad70192213d6a8032bdbcd1f1 SHA-1: 31d12649c58e2624c1d6cd872e028722c1264055 SHA-256: 29498891fed60a5185fd0b6b17406956646c9999164d5b9d73bc8aced53a55a3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to book search terms. The presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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://xezojetit.ru/aws?utm_term=dean+koontz+books+jane+hawk
    • http://fizarumokugafu.mywebcommunity.org/revenue_sharing_formula_in_nigeria.pdf
    • https://static.s123-cdn-static.com/uploads/4373749/normal_5fe3907a34866.pdf
    • https://static.s123-cdn-static.com/uploads/4412584/normal_600037624fdcc.pdf
    • http://dnepr24.info/39514126043t3195.pdf
    • http://mosquito.codes/new_testament_reading_plan_180_dayslo9gg.pdf
    • http://wijasagasipode.getenjoyment.net/c_programming_break_out_of_nested_loop.pdf
    • http://segway-wheelchair.ru/40854601136evc90.pdf
    • http://jajuviramigawo.medianewsonline.com/xodibikavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e892e450-c182-4d2f-92a7-120cd1a9ab79/codependency_for_dummies_cheat_sheet.pdf
    • https://uploads.strikinglycdn.com/files/e126ebbb-b47e-4235-90f0-1f09a32ee088/58691901704.pdf
    • https://uploads.strikinglycdn.com/files/c60f958c-9efb-4aaa-ab07-5075d5d15707/leather_carry_on_duffel_bag_with_wheels.pdf
    • https://uploads.strikinglycdn.com/files/b7677d50-18a5-45f3-af2f-b91213d5b81c/lugigu.pdf
    • https://uploads.strikinglycdn.com/files/d07dbdbd-c7f8-4871-8c20-8a885b7cc428/which_software_is_used_for_android_application_development.pdf
    • https://uploads.strikinglycdn.com/files/d446b4d0-a46a-4285-9cbe-ba411400792d/stack_cup_drinking_game_instructions.pdf
    • https://uploads.strikinglycdn.com/files/1def2304-e4d3-477b-aeb0-445d6870ea95/45033708453.pdf
    • https://uploads.strikinglycdn.com/files/eabcd72e-1ac9-48ea-bc9e-4b6e5e323f6b/bufizari.pdf
    • http://dufobirufo.atwebpages.com/odyssey_text_robert_fitzgerald.pdf
    • https://uploads.strikinglycdn.com/files/1f6c5b06-14f9-4cae-8581-618d742901dd/what_is_an_example_of_order_of_operations.pdf
    • https://uploads.strikinglycdn.com/files/b695b6f6-05a4-4331-b710-1d72b465a9e2/how_to_reset_kitchenaid_refrigerator_water_filter.pdf
    • http://dapufojutujat.atwebpages.com/daxijaxasavamovob.pdf
    • https://uploads.strikinglycdn.com/files/61ebf052-d461-4a19-b717-a1011a593b4f/54999018030.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_off0000ea95.bin
c26c70ea42b30c61d18e2496b404e8dfc17d1770ec46a825cc36de24f7dfa48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 5068 bytes
font_01_sfnt_off0000fbf8.bin
d5c06da2a503f32de2c505f046dbac40d63088f68b4f7769b40599d005118ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 10324 bytes

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