Malicious PDF — malware analysis report

Static analysis result for SHA-256 d148f36af93293ca…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 18:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22f3f69bf76325737f1844bef136b73e SHA-1: d52c2e545521676445aa28ef8260291cc5eba080 SHA-256: d148f36af93293cac4f96082715a931af20b30b899421d916c83038e5b622feb
116 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a callback phishing lure. The embedded URL, while not directly leading to a malicious payload in this analysis, is associated with the phishing attempt. The document body, though heavily obfuscated, contains text related to a 'ti nspire cx cas 2 manual' and application details, likely a pretext for the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=ti+nspire+cx+cas+2+manual
    • https://cdn.sqhk.co/teforoke/Ojshgx2/bad_piggies_field_of_dreams_hack_download.pdf
    • https://cdn.sqhk.co/jaxaletadi/jhgEngg/american_pie_2_soundtrack.pdf
    • https://cdn.sqhk.co/fukonovum/T1jjarO/48375361445.pdf
    • https://cdn.sqhk.co/mepapogivoma/fSjaoHQ/funny_video_tik_tok_download_pagalworld.pdf
    • https://cdn.sqhk.co/bivuwusim/esibGbJ/jivuju.pdf
    • https://cdn.sqhk.co/jimevexir/jgjj7ZS/86655760021.pdf
    • https://cdn.sqhk.co/rigizisojix/eLo4bVu/bovetefigofosasadip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52e03c0b-849b-457a-8b56-0717d0ffec3a/fisher_paykel_dryer_reset_button.pdf
    • http://loxeputogojew.rf.gd/wotigavab.pdf
    • https://uploads.strikinglycdn.com/files/2c51fa09-e995-499b-ab7a-b27197cb3c3a/1587306029.pdf
    • https://s3.amazonaws.com/wixatax/bizosedajizavaloralexa.pdf
    • https://uploads.strikinglycdn.com/files/ed33a0a0-95d7-4da8-8009-aa61015f928f/square_d_200_amp_transfer_switch.pdf
    • http://tananij.rf.gd/adobe_indesign_cc_tutorials_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/44b87799-aaa9-4dbf-891a-c97b3eabb982/bacb_5th_edition_task_list_supervision.pdf
    • https://uploads.strikinglycdn.com/files/c9506f73-4c6e-471a-8f9d-9736791720fb/how_much_is_pals_certification.pdf
    • http://zokitidekav.epizy.com/ranilewokavaj.pdf
    • https://uploads.strikinglycdn.com/files/ab535456-accb-46c3-8185-a69d1efe7ca2/briggs_and_stratton_500_series_158cc_carburetor.pdf
    • https://uploads.strikinglycdn.com/files/291878ad-baed-451f-b0c5-2e88dfb5dd7b/bunker_hill_security_camera_app_for_iphone.pdf
    • https://uploads.strikinglycdn.com/files/1ff806b6-dae8-4207-89c6-dc91bda8b599/still_alice_netflix_deutschland.pdf
    • https://s3.amazonaws.com/nedijowewoded/amniocentesis_is_performed.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b4.bin
d9ba0d8151d292ec0bb9dc13f72b542ad2ec768d6e69290e43cc1770e95b2839		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B4 5228 bytes
font_01_sfnt_off0000ea68.bin
02ccbde8aba61fb8d4b6df374248e1058617d2af2d984ec01113c95a2527a91a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 11848 bytes
font_02_sfnt_off00011285.bin
a6a755888ea06b4d2e2fce5d6c4ebefc7fe6fc2d5dbfe430160044283f4e75b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11285 16172 bytes

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