Malicious PDF — malware analysis report

Static analysis result for SHA-256 8484ee8bbf0b4d29…

MALICIOUS

PDF

77.6 KB Created: 2021-06-10 18:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 839d387fb24b5d81ffe30ca5cce4757d SHA-1: 5220649973b8a2de1034fba315ee664d5aee40a4 SHA-256: 8484ee8bbf0b4d29f1b3711abd9d44ac17dcd7df3eb9666fe39af00e5875c124
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to 'wireless bluetooth earbuds manual', which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=blackweb+wireless+bluetooth+earbuds+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374373/normal_5ffd0d6d9cf50.pdfIn PDF document text
    • https://nebavorod.weebly.com/uploads/1/3/1/4/131406600/c046e0f5ab10765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5fe289d157027.pdfIn PDF document text
    • https://zedazepofa.weebly.com/uploads/1/3/0/9/130969939/06ee1074b84af6.pdfIn PDF document text
    • https://vosexubef.weebly.com/uploads/1/3/5/3/135303792/f8ed0a50f20af5.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/mawujenesep_pusabifasupe_wotuxuwajox_gumajavidet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_60443deae61a2.pdfIn PDF document text
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/1321685.pdfIn PDF document text
    • https://xixinuwomisit.weebly.com/uploads/1/3/1/4/131437484/zilebalaxezizag.pdfIn PDF document text
    • https://liwojugimigazip.weebly.com/uploads/1/3/4/9/134904469/bawofasafexiz.pdfIn PDF document text
    • https://gujuxufun.weebly.com/uploads/1/3/5/3/135398829/2e6a58.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/miwonomij_fawezoputu_muzema_zubivikuxo.pdfIn PDF document text
    • https://vevorusafe.weebly.com/uploads/1/3/4/5/134516648/sajagori_kubedotavixo.pdfIn PDF document text
    • https://febotagi.weebly.com/uploads/1/3/4/7/134728548/4210467.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4494431/normal_60b263c6a5a01.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/650c47a5-7fee-44ec-b559-e493eec5b8e8/rikagoxuduwulozusujima.pdfIn PDF document text
    • http://fosirodovo.pbworks.com/f/how_to_fix_samsung_tablet_10.1_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655100be-7387-4e61-a5ae-69e91a969fdf/zekedufomaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252affff-d49c-439e-a06e-48827a253a16/demon_hunter_wow_tank_or_dps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d18091e-0a45-4d9d-b5d3-e4ea1125eae6/94178446404.pdfIn PDF document text
    • http://povelin.pbworks.com/f/sigugenidafuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a8e986-a491-4739-86ac-1845e11d16bd/rumozu.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/f/letter_j_tracing_worksheets_preschool.pdfIn PDF document text
    • http://pevozowo.pbworks.com/w/file/fetch/144874899/action_movie_hindi_dubbed_watch_online__50____Low__14.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_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 5524 bytes
SHA-256: 43388a1f9c4a19a7b5eb3c874514bcdbb85cb67e9ba26f39f8213adaaf88c1f3
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 10608 bytes
SHA-256: 4dd984018cf6b8dc1370d4229efe436504287c666690b1f1dd9802c47d400f65