Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dbe475d0959b8c…

MALICIOUS

PDF

72.6 KB Created: 2021-09-29 08:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 238809b3df4d1223ab20e6a0087f98b3 SHA-1: 409f5fd1ecfa5de1b27f91595169c401186a02ca SHA-256: d0dbe475d0959b8cfdc796f6c1947ad1947a1e5520b488a39c54fc8d17245650
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=supernatural+season+6+online+free PDF link annotation
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/56434538378.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93393254673.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210913150839430.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/30560581283.pdfIn PDF document text
    • http://ranch.pl/files/file/luwezudiwonemexer.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/jidetajopiresuvolezejoja.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/xukupebuferutanajipujo.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/28374007141.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/95209295694.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/13767684390.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/60669901472.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f9c0e2dfe8e20ebf64c5e5f9aee1c8d0/jarubusorizemabu.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/58826288418.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/nses2r3gs8bee4a89qddh1pcu1/90233078986.pdfIn PDF document text
    • https://akconta.com/uploads/files/62072109183.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/gunisisaliwemurole.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/159161153961369a72325af.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/nejepuxesewu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/161420b0dccda9---98653922612.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147f21c6e062---fojuwevigepuzozivavifelas.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615061e1ba778---57285362889.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/xilazogafan.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_off0000b835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04C 10696 bytes
SHA-256: 1eee4e47466cbd2572c4582551058d02087a1f15463dc044516d45f91bb4c22b
font_02_sfnt_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 17224 bytes
SHA-256: c1fa39677ab8770ea81b86e7639028313cd0114e13c657be2cf68688fe94ada9

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