Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d37a13331dcb39a…

MALICIOUS

PDF

69.8 KB Created: 2020-11-10 21:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304710f02a39362f47a7e4f26210c054 SHA-1: 7b92101f1fe6722b77f7e9870f020e0bd3df5320 SHA-256: 3d37a13331dcb39ad687f04a1370c1bc7172e83f00ccd426c52cfc6ed3cc6f18
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'driving directions', suggesting a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?keyword=driving+directions+to+nellis+afb
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fa34f8c62d88.pdf
    • https://fukubumo.weebly.com/uploads/1/3/4/0/134016705/cf227cf4a1110e.pdf
    • https://xeganixirutor.weebly.com/uploads/1/3/4/5/134508666/d9615a5bc19446b.pdf
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9d067de8de1.pdf
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f99c27f39657.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/80218923-3c8f-4fee-8fa7-1a54ad335c1c/povutebofefonebefugi.pdf
    • https://uploads.strikinglycdn.com/files/601edd15-10ef-420c-af47-239c9cae6f1f/lovusadene.pdf
    • https://s3.amazonaws.com/kavugusepe/crush_richard_siken.pdf
    • https://s3.amazonaws.com/kofabube/todawerumebawitara.pdf
    • https://uploads.strikinglycdn.com/files/629c5909-5f7f-4846-8c85-f86535c3b233/bukadadurugogevawebej.pdf
    • https://uploads.strikinglycdn.com/files/b7313d58-2f4c-4d55-95d8-06691adcf786/74380371855.pdf
    • https://uploads.strikinglycdn.com/files/4d85fac7-c5be-445a-9ae9-2064ebbba40f/alarm_anne_marie_mp3_download.pdf
    • https://s3.amazonaws.com/fasanag/appalachian_trail_guide_to_new_york-_new_jersey.pdf
    • https://uploads.strikinglycdn.com/files/4938132e-c33a-4848-aa03-dcde7bc7ca59/puzuned.pdf
    • https://s3.amazonaws.com/xanebavifamopez/amoxicilina_suspensao_bula.pdf
    • https://uploads.strikinglycdn.com/files/2fca42d0-a85c-404f-a2a6-2fc77cbe5dd4/swift_actions_pathfinder.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_off0000d30e.bin
16f84c99805850489958b1953bf1fd3cb5c2cc276a9b424cc8f7cc34988e0a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30E 5388 bytes
font_01_sfnt_off0000e580.bin
37f55cf00e9fbef34cead753702fc8a25279c44d2b1b1bb3114a2b6db7dcbd52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 10660 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.