Malicious PDF — malware analysis report

Static analysis result for SHA-256 40eeb990a158150e…

MALICIOUS

PDF

79.6 KB Created: 2021-01-06 12:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6697410742e58b75ca2b41e929d5f120 SHA-1: 8a250ee1b9530e687ee959832772317430b3812d SHA-256: 40eeb990a158150e32d36f9bebafb5b8673b481d928845807de59bade724ebed
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffmen.ru/aws?utm_term=pvcs+command-+line+reference+guide In PDF document text
    • https://cdn.sqhk.co/pujapipiwat/S5U3fgO/31262767682.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/ijoCohf/ludemosikafuv.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/K372ieL/jixuvoxikiwexip.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/hDTIMhj/cars_vs_cops_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/wqhdhgN/resident_evil_revelations_2_walkthrough_no_commentary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5faeec3994858.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/YicWtZz/rail_rush_2_free_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/jfOvy41/ghsa_football_2020_covid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b82d8a5-b711-4cb5-9a55-86d9937adc05/76231185752.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/old_man_at_the_bridge_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20de19f-5436-444b-a886-8414408b2589/19824352336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe5a83a-862b-4aeb-8c52-9fff9f1c6007/69172911041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c265ab97-c85a-4232-acea-4fec71687bc2/98312918529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca59f3ec-6c87-4c9d-8721-6bdc6046846c/tunevuwofisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350f3521-6670-4be1-8cb5-88fe471b9f59/s1_stereo_imager_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/hang_tag_template_illustrator.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_off0000f819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF819 5432 bytes
SHA-256: 1c8dcaf4c91db4470807c3f4fed239626753b532427fa5f592316936215548a5
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 11460 bytes
SHA-256: 7185105257c7014bea5424c5d5a2169b56d7292122fae24f1a61713e9c973181

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