Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe46ff7a3966e1c…

MALICIOUS

PDF

73.2 KB Created: 2021-05-31 23:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ac50af34f96f72f87679bf266128f4d9 SHA-1: 4433eba2dd80c6b4c888e0edca290117ae674cc7 SHA-256: 9fe46ff7a3966e1c9aef3b6d9f22d737760a8dd3f2f64074f3819a1bda827347
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links, many of which are hosted on disposable or low-reputation domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/pbw?utm_term=what+does+inactive+account+mean+on+credit+report PDF link annotation
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/vimelowevu_giwedofojozilem_jumaxegam.pdfIn PDF document text
    • https://lababober.weebly.com/uploads/1/3/5/3/135329518/fepemutafu-luxirejuk.pdfIn PDF document text
    • https://geduwitanezuter.weebly.com/uploads/1/3/0/7/130738684/xopubabudoram.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/319e7d27-96f2-496a-95db-bbbc651b62e3/bozavuxalumipabiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e1ae26-53ae-406e-bc49-911954e33f2b/zuxilidavudivudubi.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144423042/otizmi_oyuna_getir_yorumlar.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/rogasawij.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144420258/cif_volleyball_score_sheet_instructions.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/46901842959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a37fffa-b676-4be5-83e8-e3dddc413050/zazawoguw.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/61858409723.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144411435/human_genetics_concepts_and_applications_12th_edition_by_ricki_lewis.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144415533/hypertensive_emergency_guidelines_jnc_8.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/28982318961.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/teddy_bear_making_patterns_free_download.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/w/file/fetch/144418005/50460047372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712e7eb4-989b-4056-aa4a-7e7a5a36c55e/how_to_write_drum_beats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d636245d-0449-4888-a159-2a6776650756/hobart_meat_slicer_manual.pdfIn PDF document text
    • http://togusan.pbworks.com/f/advantages_and_disadvantages_of_non-_probability_sampling_slideshare.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_off0000e08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 5352 bytes
SHA-256: 63c9bba2bf20d7466aada147faffce250ce1c76a8e135b00f272f9c3ce8a6441
font_01_sfnt_off0000f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A6 10332 bytes
SHA-256: de5598348219a7689a9ff20c9b825497cd2693da550d7601594e45f9eb65d05b