Malicious PDF — malware analysis report

Static analysis result for SHA-256 3001b8b3bbb4f5ed…

MALICIOUS

PDF

72.7 KB Created: 2020-12-07 06:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4657ed9464634d5d3274f9c94c9afb6e SHA-1: 1eedc64906ba5bf6f3ab3676003cc0e628ddc9df SHA-256: 3001b8b3bbb4f5ed7875e24f9e83004ffbf55434a4c3f836ce9ac2d77e007afe
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This, combined with a high ML score and ClamAV detection, strongly suggests malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Testout server pro install and configure answers', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?utm_term=testout+server+pro+install+and+configure+answers In PDF document text
    • https://vorarixumo.weebly.com/uploads/1/3/4/4/134490966/tutitejav-fazop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fb950b2b6867.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1145bc819f1cf4a04bed/1606291781685/69850913587.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/raze_3_unblocked_games_66.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/bisaya_to_english_sentence_translator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f89884-31a8-4cd9-b28f-100149d4b57d/22662192795.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc570e5104edf1d779faec4/t/5fc7f1df9c2e343139b98d01/1606939103906/47245406143.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd12507dd1bd0a7624d7cb/1606226514905/louisa_county_high_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc0facd145a8629dcd3f518/1606482640005/what_does_it_mean_to_be_alive_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ce745e8e827d429a49c0/t/5fc9bffa9c93c058c483ca82/1607057404358/video_browser_downloader_pc.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 5424 bytes
SHA-256: b615a20fc715de4030001a5151f6bba65d302cb0c4b21cfa08e71af93efd9144
font_01_sfnt_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 11040 bytes
SHA-256: f094d8d48626a589892b196dfa43b546bf404cc34e07f3d01c18ea591b6c54aa

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