Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe49a6f1ace4b8d…

MALICIOUS

PDF

142.6 KB Created: 2021-04-02 14:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e809bea1dcac010bedc9f4c2ea3661b9 SHA-1: e4bb9abf46397631d469d805000d902ae9709f20 SHA-256: ebe49a6f1ace4b8d4afcce353b63c0b1c74f233c2090ebfbf03f60a64b273b2b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains associated with link farms and disposable hosting, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links. Although no scripts were explicitly extracted, the nature of the link farm suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://gimoguvi.ru/strik?utm_term=pokemon+platinum+walkthrough+eterna+city PDF link annotation
    • https://cdn.sqhk.co/rozamulev/jakmYma/office_boss_chair_olx.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/99134342436.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/GvTjhhY/xinidux.pdfIn PDF document text
    • https://sekazijefof.weebly.com/uploads/1/3/2/3/132303314/39aa66446ac91.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/qWB9igU/dosojutudewi.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/W7hbgcw/lenulunugex.pdfIn PDF document text
    • https://dabosimupit.weebly.com/uploads/1/3/5/3/135397997/bupovila-dolazifoleteke-risopozi.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/bariatric_cookbook.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/solving_equations_with_fractions_and_decimals_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/buzosefif/gihfie5/12201979093.pdfIn PDF document text
    • http://rawitotizoxuk.scienceontheweb.net/91516303555.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/xepudi.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/5703608418.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/mogoxakatapetilimapo.pdfIn PDF document text
    • https://cdn.sqhk.co/vujositet/bhhXnpN/25816090468.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/bewaginomitan_lojuvogad_vefobi.pdfIn PDF document text
    • https://cdn.sqhk.co/favosejo/3Rjhggp/9406842052.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/bheWDHZ/4038228219.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/ijjjiHg/economic_history_of_nigeria_19th_20th_centuries.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/adpjcgi/wilderness_survival_school_michigan.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/wejuvono/sebulojixele.pdfIn PDF document text
    • http://fazovalekotevo.onlinewebshop.net/befizodibikita.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/fiction_reading_comprehension_worksheets_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/divine_mercy_chaplet_prayers_answered.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/bapufuzonavoto.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/sensory_table_ideas_for_winter.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_off0001f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F483 5428 bytes
SHA-256: de535f5266d3f263e30e96009bfa99f6f8b2fef57a7d9c1b09576ac09cd15c41
font_01_sfnt_off000206f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206F1 10968 bytes
SHA-256: 954ff4cd871063df448abd828151f0aeef0d95cab5bea0f9b59fe0e6c83a276f