Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3386d644438bb7…

MALICIOUS

PDF

81.0 KB Created: 2021-03-02 04:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 12ea78313a763266308f005ff87f970d SHA-1: 4bb17e7f35a6d7887cb73cadf276a667e49bf09e SHA-256: 6a3386d644438bb7b671afa1a850646a479261dd6aee8c51de543323220c83c4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam campaign. The embedded URL 'https://midufefew.ru/strik?utm_term=is+the+overlook+hotel+haunted+in+the+shining' indicates a lure related to a popular movie query. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=is+the+overlook+hotel+haunted+in+the+shining PDF link annotation
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/1402155.pdfIn PDF document text
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/0640e3bb86f5ade.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/fimenejetutafaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_600eac5bdaac4.pdfIn PDF document text
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/0c0b1593.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/DDruiax/slither._io_immortal_snake_hack_download.pdfIn PDF document text
    • https://vimiwakemimug.weebly.com/uploads/1/3/1/6/131606159/cb263ecf571.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/i5heErc/pebefaxinimalipel.pdfIn PDF document text
    • http://lnstagram-helping.live/beneficios_del_ganoderma_lucidum8uv7w.pdfIn PDF document text
    • https://cdn.sqhk.co/xusokivaxame/X5LO4Tl/bujidogaju.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/Vhgieii/rum_raisin_ice_cream_recipe_cuisinart_machine.pdfIn PDF document text
    • http://f13x.xyz/fovasizajuvidi0typc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_5fd92c65d3cb9.pdfIn PDF document text
    • http://hookup154.fun/mazarorx6r42.pdfIn PDF document text
    • https://xoxopurotawasuj.weebly.com/uploads/1/3/4/6/134651309/ximunusatin.pdfIn PDF document text
    • http://quickstore.pro/vunapupaworabebatafaramavfchws.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/jiwotarotavuz/list_of_monsters_by_challenge_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/desudikulinejepis.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_off00010172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10172 5148 bytes
SHA-256: d3e2f7f2b85bed16f8ed77b2016a6d30c3b723a31e45014e71cd65c4acbcaa07
font_01_sfnt_off000112ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EE 10468 bytes
SHA-256: ad4c3b69c36fe4625ad4c500ffe39c0eb4b0a15c4e23cb6baf5ac7c67049965e

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