Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc8fd030f54bcdf…

MALICIOUS

PDF

85.7 KB Created: 2021-08-15 23:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e464db8fcd22d698cae7bcc654b6254d SHA-1: 95bb8e6cef4e5e0c2c0be3c15c81a3ad30427769 SHA-256: 0bc8fd030f54bcdfa76f87a7c0ecd239281516a640bd3be3859fbd088bbc01e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics confirms the primary function of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://laborke.ru/uplcv?utm_term=best+way+to+generate+orbs+in+destiny+2 PDF link annotation
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/62n7oijk1s4b7ann0lq0osh5i1/43376724590.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/24799265606.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/wenupetobutuvezave.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/netakakuwod.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/db873ceb3c73babbec4f87224890d941/62834168010.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/bbd7d68e2e949bf4a88ebef1bce45bb3/werejivaritopuron.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/gokuzutesorazafubikeki.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48f05d0f9a---95395384199.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/89083603438.pdfIn PDF document text
    • http://didula.ru/img/file/4324685729.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/v545hkuk2hggt8ptiiog0ov3t0/59718610878.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8040ade901---63001282514.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/86651883827.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/71177209340.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607032a1f19f2---besisoga.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607effdbc12e2---33407464319.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/22b0b774adde554bc867943a03256120/88487430313.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/14654808384.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/t67tgopps1pec64260090pard2/jopovazof.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/8bv16ffd4vln1vfggm8kt0ov85/36098985179.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/78345013839.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b6132929e189dd4182a38adc4ea5f073/21893548662.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/bugilonixinur.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/zakogexifoxoduz.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210614021651.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_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 17712 bytes
SHA-256: 7f18013669a5b97c3b9f0e8098ab97bbcb96d589d98b34e677dd580100123df5
font_01_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3C 10888 bytes
SHA-256: 825c19c73bb821a89fa9c78807b0ae0ca0885130d4730641fa45e6b05f204603

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