Malicious PDF — malware analysis report

Static analysis result for SHA-256 1186b52c2427df6b…

MALICIOUS

PDF

77.0 KB Created: 2021-03-04 15:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f26554f7e5605e9cb43ba90edd1ead7b SHA-1: 8ecef359a1ae6c11d391c8b098058be994564176 SHA-256: 1186b52c2427df6bf1c8ea4de83ce2f0c563ca798bad330aa715cce7ae3e9ac7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URLs point to suspicious domains, and the document body, though obfuscated, contains references to external content, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jacksth.ru/strik?utm_term=how+to+use+wahl+hair+clippers+for+beginners PDF link annotation
    • https://cdn.sqhk.co/wazafanez/kicrjiD/19347665742.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/GjdqHtL/pulsera_xiaomi_mi_smart_band_5.pdfIn PDF document text
    • https://gufubavofunopi.weebly.com/uploads/1/3/4/7/134704705/7011137.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/hdViigi/muvuvovovizutuloxeseza.pdfIn PDF document text
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/mopafanax_bazuguvi_gumole_zibiwurozok.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/PjiDie4/49814167012.pdfIn PDF document text
    • http://dawepajez.22web.org/pexuvenedunetukobe.pdfIn PDF document text
    • https://paxogusav.weebly.com/uploads/1/3/4/0/134040839/wokazajijid-lirupumu.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/ihsTKgi/nfl_standings_week_6_2020_schedule.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/fojaxexino/rowenokasedelipibepu.pdfIn PDF document text
    • http://nasutewu.epizy.com/sebinilotirowez.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/dosupidonesikusosutav.pdfIn PDF document text
    • http://mubizutoperix.rf.gd/94073393582.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/burrakatha_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/action_vrit_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/2012_chevy_sonic_manual_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/apple_airplay_for_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/canada_goose_bomber_size_guide.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_off0000ec4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 5468 bytes
SHA-256: fda9f5142f99af64f2d459efbf343f472b6e1cc87f6f714ae4a1ab6acec550ab
font_01_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 11720 bytes
SHA-256: 6f8f4297e354e33fabd5c765c219ede1b559ecc2b638c62b5cbb6e62947e819b

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