Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c048817ec9c4e8…

MALICIOUS

PDF

85.1 KB Created: 2021-05-01 05:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ee1753f21179d00ec50469c981e6f375 SHA-1: 2001c52701c7012e4b6010194e6e9eae23dc0c4e SHA-256: 97c048817ec9c4e84b84c0fdd3e19c7503d28cf950f135c26ab78a78a7d77ca2
194 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ClamAV and an ML classifier, 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 presence of a 'download' button lure further supports a malicious workflow. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=how+do+i+get+out+of+the+afge+union PDF link annotation
    • https://cdn.sqhk.co/bekutojeke/igzigH7/58488028697.pdfIn PDF document text
    • https://samojosaletope.weebly.com/uploads/1/3/4/0/134017273/2622175.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/71152848722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476268/normal_5fef7f3ab74ac.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/670393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_6037e673c761a.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/gcJM0fC/95746109919.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxifup/l7aWuha/best_2_player_games_on_ps4_pro.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/apqp_manual_4th_edition_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/ihjghiK/commander_legends_booster_box_pre_order.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/wjje3gd/vaforigibad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_6048531dbb064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494138/normal_601c797e2f49a.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/design_proposal_example.pdfIn PDF document text
    • https://cdn.sqhk.co/soruwere/DVihZBj/nsw_ombudsman_reportable_incidents.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445541/normal_5ffa1b2660f6c.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/egdjaja/juzuvowaxidelepuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_a3c7d32fae854a96b9b001e72f3acb5b.pdf?index=trueIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_d187d52850fd4cdbbdfaa63c77736387.pdf?index=trueIn PDF document text
    • http://rususekobijo.myartsonline.com/tratamiento_de_aguas_residuales_por_lodos_activados.pdfIn PDF document text
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_16415a5429a1411bbd2cebe964308543.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_115394289a6049f3bcbbc2e4a8b3ef01.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_56ee9063b5374f8dbad22ac7abb7eb6f.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_off00010fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 4916 bytes
SHA-256: c9efd89647505f0a66d8e2dcd2127fcb2d55baee8ba247a6baa029ad7c275494
font_01_sfnt_off000120b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B2 11312 bytes
SHA-256: 48f88c6277847022836240182a3728df765525f0be9901106d29fce8db7d45e4

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