Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b481a1c2056abb…

MALICIOUS

PDF

89.7 KB Created: 2021-03-24 05:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 443a74dfbeaa99ba1fb683586225bc63 SHA-1: 455c750516b25dd6053f26083c62fb0c1fb3029f SHA-256: c8b481a1c2056abbfb145b4eb98eeb6f06876512c19e851f354763d650651cd4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the nature of the link farm suggest an attempt to direct users to malicious sites, potentially for credential harvesting or further payload delivery.

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://lozipotod.ru/aws?utm_term=dancing+at+lughnasa+1998+watch+online PDF link annotation
    • http://ralugugifoxatir.scienceontheweb.net/619111131.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/aidkijR/moose_jaw_warriors_game_tonight_score.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/gxicchd/8675889315.pdfIn PDF document text
    • https://cdn.sqhk.co/tenerinirik/Cm5hjYi/wish_list_template_for_teachers.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/7792336728.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/60bfb103-c72f-4675-89d5-65c66ff1337d/45872934262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab04c886-18f9-42c3-8533-534b52dcfd21/takesepoforuwipiweniduz.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/diablo_3_darkening_of_tristram_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3333ccf3-4500-4e19-880c-c240557c6b30/chess_tactics_for_students_bain.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_c27ea2965b1d487eba0859e6b6598204.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_77dab40c0ece4904a336ff24ea1ef434.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitirew/22504957127.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/dubaxevevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c91e3b-2ba4-4b38-906d-deb2728fc152/70745368709.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_cd36ea27e7304ab881862f253601afef.pdf?index=trueIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_3bc9ca0e66d04cc5bd01b30136c3a23a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batiku/greensleeves_sheet_music_for_alto_recorder.pdfIn PDF document text
    • http://dubanexotokegel.myartsonline.com/79527293274.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/mdf_plywood_sheets.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/west_bend_bread_maker_manual_41413.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_6e5b374472f84b3d8a4f59b4730b4cdd.pdf?index=trueIn 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_off00011fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDB 5460 bytes
SHA-256: 281f7bcb3428770d6d031b1f858f67cd107c6699381fc315409f66fa8d6a72fe
font_01_sfnt_off00013287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13287 11592 bytes
SHA-256: bcf8e2788e281e3a6349a5099751c3f6ca113d61dd33ae78a46ae04e476f5766

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