Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32d5640173c937c…

MALICIOUS

PDF

86.7 KB Created: 2021-07-16 10:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0bf8a4a741a199a206efcfcf7c88d7ef SHA-1: ff9923941de63a6fd505bec579e471f76d557e00 SHA-256: b32d5640173c937c396d60899d43a1c983e61868d3e5d6cebe552214a98855d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to lure victims to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=i+look+forward+for+it PDF link annotation
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab25098cf83---miwokawax.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/tixijilidaler.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8ab5f9cdb9e07e8cf0a97a8b761f6d60/mapagimak.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/lufezumifedibagafapuvav.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/digenezabexaxuk.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d02ee7dbc---pufovera.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/3f79edfefed82758100ce94a8dd9b205/donul.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/f5241ca79ad9ce9cf68b1fca30baa5f4/puxitegor.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd7c675d12---melusifeto.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823a4a74218---47611040233.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7c54df1ed22f7c2860f531d5fa685965/xabuwozawogewabezeki.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4f4cba1046ee29fa544f9b4fe76e8129/82256268.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/jarub.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c465d22a2ee---worupewetudu.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/4gqio6sqgotmplv69ts9ish93q/jefibifedigabagepe.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c70440ae573---36876951117.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afcfd82ac26---71277870636.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/13040945998.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d50123878bb1c75a54d3fa090152c0d2/pimarozabepabiwukogigu.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/53098564591.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ksdqn2ig77856v47f830g6rk8n/jimaregezajibatunobekafa.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee24f2d8ae---zavebajefajoxuliw.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/1034773585.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090059c59ab2---saseraminamima.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/90932252807.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_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 17204 bytes
SHA-256: a2a634711f9b4a5a069e42be36cd66e7bd451355491c24b10b4f75927846a9b0
font_01_sfnt_off00011ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 10072 bytes
SHA-256: b538659ae3f43fba4c88246954da086d9029d1b051b18dbc87a701c57732b416
font_02_sfnt_off00013581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13581 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1