Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f121d14c3f30bc7…

MALICIOUS

PDF

69.7 KB Created: 2021-09-07 10:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ab84b38a35863a0bd4dd3e6979ef097c SHA-1: 119ed8624263aac4131dfacc9c26f5968c6dbe36 SHA-256: 8f121d14c3f30bc7648a48ed01680a8f7cca961b7639c7986a298659236a8840
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, directing users to numerous unknown and potentially compromised websites. The presence of external URIs and link farm indicators suggests an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://spearmanhsreunion.org/clients/e/e1/e1754705b4c076d7cd520c5e9e79ed07/File/65668136322.pdf In PDF document text
    • http://timebymtm.com/upload/files/jifupedefomosuvosuwif.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/67924957911.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/rovepekajowawiligi.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/18384325276.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/9ccce8b693834507baa65323713a2031/45030101755.pdfIn PDF document text
    • http://debden.org/userfiles/file/paniwifogelu.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/bigamagelamavurogitok.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/76908812382.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610db007e75a2---1105970389.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607238e92403c---10992971930.pdfIn PDF document text
    • http://vejwun.cz/images/xulenisew.pdfIn PDF document text
    • http://matras-devison.com/upload/file/dilebipinaxepanewekojono.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082c932e2c24---migolixiworemirosipiv.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a618cc30ffa4ddbd3e0fed39029a19cb/39756889302.pdfIn PDF document text
    • https://hosrem.org.vn/ckfinder/userfiles/files/sovukeseranoramib.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/zezalovelo.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/golozake.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/mewazovavuruzi.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/19983250902.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/zaraferazok.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/1568e3782d8b4651821119984a8a8e1b/10294961405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=los+huehuetlatolli+pdfPDF link annotation
    • 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_off0000b2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CE 15504 bytes
SHA-256: d72a065102ea15e8c6f45986bf6b8a68b6221d57184affa1ab88dfb2b408605f
font_01_sfnt_off0000d994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AB 10448 bytes
SHA-256: 83cd558852f1134091e741696f588a1d27bc64d1a6634a33aaccbd73dc8fa336