Malicious PDF — malware analysis report

Static analysis result for SHA-256 3317a804b8844a0f…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 03:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04855856b30ef93c9f02ed30901e07d8 SHA-1: 9cafc61d0e372cc77c21ebb7327503cc97023923 SHA-256: 3317a804b8844a0fc308ed220f33196f65a1a985518aa781f73a62eb920e6a7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://medvor.ru/uplcv?utm_term=gloud+games+hack+apk+download+for+android PDF link annotation
    • https://ciiinnovationsummit.com/ci/userfiles/files/25432667505.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210912181721.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/pisej.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/zuwevowazapu.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef794def26---56823057946.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/81144160105.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/76118877782.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161408f131e655---30482270050.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/52605222857.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/nirupupuxovoz.pdfIn PDF document text
    • http://chineseclothingonline.net/File/danimewixozimi.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/81442592733.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/bee12515680d979999d84f5697f3952e/92097849214.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/tumavazuxasibapasabakazas.pdfIn PDF document text
    • https://stl-log.com/htdocs/cljr/data/files/tinowezuxesigefimokota.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/3841417080.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/48772900402.pdfIn PDF document text
    • https://ordermorestuff.com/cmsCart/upload/file/pidoxexefejatuwi.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/17081189005.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f676215dff---75144074504.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318367cee50---fanemudefis.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/vefopataxama.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/xazinonured.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/fukajepifowomowofofasomuz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24D 15408 bytes
SHA-256: 13df5b1dbc3f4d0b10d2f1d0b3c6a19cbfb46a8347c9f0e846a45d3eb0182ca8
font_01_sfnt_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 11284 bytes
SHA-256: c997bc325e21435070a5aef6e8a137cc7586a30799ccdcdde9efebe604dd50fe
font_02_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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