Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b0e4c03d74b5c6…

MALICIOUS

PDF

75.3 KB Created: 2021-04-02 19:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46dbda99037c93fb21a7ac32f732fe50 SHA-1: ddd1a508d7544a8c5c6fca960b66af6795f26c20 SHA-256: 46b0e4c03d74b5c6ec3f7cec9af4c999933a8d586a4158f43b17f79ae6cb0e64
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it contains an external URI and a callback phishing lure, suggesting it aims to trick users into contacting a malicious entity. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/award?keyword=acls+algorithm+aha+pdf
    • https://cdn.sqhk.co/babakobesuxe/R23an5J/92387208798.pdf
    • https://cdn.sqhk.co/vakenuda/ijijiiO/byju_s_the_learning_app_download_apk.pdf
    • http://fixebojamofi.iblogger.org/cambridge_international_curriculum.pdf
    • https://cdn.sqhk.co/pasivuzuke/rhgdhf8/online_photo_editor_free_pixlr_express.pdf
    • https://cdn.sqhk.co/gufemazibafi/hh8RhgQ/71835506446.pdf
    • https://cdn.sqhk.co/purovufizu/jKjecif/craftmaster_homes_richmond_va_reviews.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7718a337-a0c3-4003-995e-9f5a51cd5521/strength_training_exercises_for_weight_loss.pdf
    • https://uploads.strikinglycdn.com/files/cad7d4a2-7107-4172-ad0c-ceeafbd5e15e/kotukomurarepaxivejaluwef.pdf
    • http://tikazujubetena.epizy.com/compassion_uk_annual_report.pdf
    • https://s3.amazonaws.com/pibabopuduj/illustrator_t_shirt_template.pdf
    • https://uploads.strikinglycdn.com/files/1fc4ab69-b2ce-4395-9d69-797b4ecb7843/genajenitiga.pdf
    • https://uploads.strikinglycdn.com/files/765ca79a-0daf-4103-81cb-18875760c0d1/how_to_hydrogenated_oil.pdf
    • https://uploads.strikinglycdn.com/files/8c62037f-8a9c-4dcc-b3da-47eee726fcfc/18495300630.pdf
    • https://uploads.strikinglycdn.com/files/5029b0b9-a0b3-4ac7-8349-0a203c0b7184/rigozezirababixivedavu.pdf
    • https://s3.amazonaws.com/bamepofewalada/chevy_ss_manual_transmission_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/71a1fd98-4494-443f-b9cd-5dc3ef338a92/dans_quoi_investir_2020.pdf
    • https://uploads.strikinglycdn.com/files/37002c52-1fba-497f-95b1-ea44d2466573/warizixapidonubulefalo.pdf
    • http://xibupafuvobiluk.rf.gd/kptcl_junior_assistant_question_paper.pdf
    • https://uploads.strikinglycdn.com/files/8962b8ab-1e11-47be-b216-1f2328a5fa9c/mamemotesosolaz.pdf
    • https://s3.amazonaws.com/geraromu/super_mario_land_gameboy_color_rom.pdf
    • https://s3.amazonaws.com/tufitijinexu/garmin_gps_mapsource_software_free.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_off0000e8c4.bin
2602e9fea6dc704af410d88ae36080fbc76367551108272366fcb063a22815aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 5556 bytes
font_01_sfnt_off0000fb82.bin
9d6c6610e7df3840070883a12ffb1e1e63c4aaca8c7945188908f6c3516737fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 10812 bytes

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