Malicious PDF — malware analysis report

Static analysis result for SHA-256 14153ffc3acb3793…

MALICIOUS

PDF

78.9 KB Created: 2021-03-14 07:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5107c8e9d2545f5946a5f08f35ac836 SHA-1: de7473ffbcd5331a92cba13f95018ba3431a1d58 SHA-256: 14153ffc3acb37936d3a6d02ac6e03d96f2d64b020be0d117d8ecb4b2d8e6662
136 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, and contains multiple embedded URLs. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, likely to download and execute a second-stage payload from one of the provided URLs. The document body, though heavily obfuscated, appears to be a lure related to treadmill maintenance.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://mezovuduw.ru/strik?utm_term=do+you+need+to+lubricate+a+proform+treadmill
    • http://jalopava.22web.org/breville_barista_express_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4370267/normal_6010d00015197.pdf
    • https://cdn-cms.f-static.net/uploads/4487191/normal_6043044f19c40.pdf
    • https://static.s123-cdn-static.com/uploads/4415518/normal_5fef1ac16cee0.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_6037d6eda84c3.pdf
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fce2ae57560b.pdf
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5fe135bc99b2f.pdf
    • http://taxevidel.medianewsonline.com/easy_flowchart_maker_online.pdf
    • https://cdn-cms.f-static.net/uploads/4407327/normal_60264788a1acc.pdf
    • https://cdn-cms.f-static.net/uploads/4501201/normal_6011838b453e9.pdf
    • http://zizodoroluxonaf.sportsontheweb.net/the_crucible_act_1_notes.pdf
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6037cd9c34689.pdf
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5ff6833e2ceee.pdf
    • http://keburej.22web.org/sefejeleziluw.pdf
    • https://static.s123-cdn-stat
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gudujezakolomu.onlinewebshop.net/zezumuzemejivaka.pdf
    • https://uploads.strikinglycdn.com/files/64436b54-b4af-4418-963d-c8b510095cd9/2008_cub_cadet_lt1045_parts_manual.pdf
    • http://wemaxoseni.myartsonline.com/what_is_bollinger_indicator.pdf
    • http://xogijowag.onlinewebshop.net/sumevinivoluvipaxerowepaj.pdf
    • https://uploads.strikinglycdn.com/files/47fd598c-e1d6-45e1-be62-2f7544301450/how_to_curl_with_a_flat_iron_weave.pdf
    • https://uploads.strikinglycdn.com/files/c298f430-7f36-4f28-9bfd-63a7ef190ffd/20847651749.pdf
    • https://uploads.strikinglycdn.com/files/918ca371-275b-4c5b-ab24-354c45b2fd52/sorisadok.pdf
    • https://uploads.strikinglycdn.com/files/35f60879-c653-47e4-9c78-844a9ca5a707/what_is_mental_coaching.pdf
    • https://uploads.strikinglycdn.com/files/f63de03f-4058-472e-9fe8-2455113dd49f/busitit.pdf
    • https://uploads.strikinglycdn.com/files/a9efb5a6-b853-44bb-bace-7ba6fc65af2d/96292812729.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_off0000f6cd.bin
e6f38439996e483fccc5ccaf371ceb4584151bba193b7be40dc4f88de0a07d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 5364 bytes
font_01_sfnt_off00010903.bin
6982be514d7ab8bfd0aa2e2d8de70b6c6ccd5db78635da23bb1cd8243075e068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 10644 bytes

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