Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b0f6c76ca184ab…

MALICIOUS

PDF

77.7 KB Created: 2021-02-22 12:03:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3d727e84abad053377bde187df0fee1c SHA-1: 94c86dd65a04c97f272002f63637c1497c65bc39 SHA-256: 05b0f6c76ca184ab82db37fe927021bca85435e38f443aa55c0b97ac4aae2edb
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URLs, with one prominent URL leading to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although the document body is heavily obfuscated, the presence of external links and the overall heuristic firings suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=line+6+pod+hd+pro+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379733/normal_601071a82b48a.pdfIn PDF document text
    • https://tadirexexex.weebly.com/uploads/1/3/2/6/132695418/9844617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_6018be49a80e0.pdfIn PDF document text
    • https://rujuramokukavet.weebly.com/uploads/1/3/0/7/130739146/dc3f84a6cf32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fcc9b11d44c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_601b4f055e88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_60182e98d3796.pdfIn PDF document text
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/januma.pdfIn PDF document text
    • http://fusavexupisedi.iblogger.org/30956595496.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/mulaka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459935/normal_5ffa43c96da07.pdfIn PDF document text
    • http://newyearshop.site/the_body_transformation_blueprintg73ii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gitipelut/barsaat_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/spreadsheet_app_for_iphone_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/rebazesemerujow.pdfIn PDF document text
    • http://mamitepibo.epizy.com/99038522370.pdfIn PDF document text
    • http://sufejijefivuvo.epizy.com/42573421874.pdfIn PDF document text
    • http://nuridoxiwe.rf.gd/craftsman_1_2_hp_garage_door_opener_drive_gear_replacement.pdfIn PDF document text
    • http://ganenimipoje.epizy.com/nietzsche_the_antichrist.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/believer_lyrics_free.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_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 4872 bytes
SHA-256: 9fd31af2d21bb28167de3d4a4de82ca664a7563bfbc8b548e9f46f6192325e32
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 11852 bytes
SHA-256: b38e6dfe14128abbcb9e248acf16d9aa34ccd168bd933e51656f60b308c5ee95

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