Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e07af43aa769f2…

MALICIOUS

PDF

92.5 KB Created: 2021-07-14 10:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3c734a2a313e593bb59a577c752e140 SHA-1: ab5f8b82f6c8bbb9a7f4f8a71a67bcc87cfda3b7 SHA-256: 04e07af43aa769f217647c172db3f132b1c2b3f4a3459da02644f10932e4f0bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting further PDF files, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings suggest a mechanism for downloading and executing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ideylia.fr/uploads/file/57431333683.pdf
    • http://bi-acaovo.com/upload/files/bemuvura.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a245b1d04c0---48752750571.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h5fejdjckrlkrm77lpok38ffg2/fedakugip.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a3e893ae6---7430349256.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/8c8a1be4f1531c11f5d76799292ed6fd/kozozeketikow.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/657608f99f64d072546c7ac90fcc4ddd/4610737038.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983c7234c86---60472027572.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9911dc8ae---bopegedejovak.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/39087764841.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/gixitirenes.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/iuq0kuc24iorc3dtic050s394t/92885984279.pdf
    • http://abpaluso.com/upload/file/nevoxijujogovufedabivawuj.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cc4cc661e5ed7163fed4949fe5b9fcc5/guzimusekivomubitopavaxi.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/85b91a041ae4efb874b9386b0d6582c6/98344434112.pdf
    • https://surupaceanu.ro/ckfinder/userfiles/files/konevefinovor.pdf
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jaradafufelevozujowo.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7ffb38db7---lixaloge.pdf
    • http://scpt.it/userfiles/files/9114787538.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608735fa07e13---56894012743.pdf
    • https://abeess.com/userfiles/file/68444609477.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/058c973c1c56a75958530aba09b38c4e/jejaziteginusedewe.pdf
    • https://eghamatkade.com/basefile/eghamatkadecom/files/fibodetusunosiwokunilowej.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pagan+christianity+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010458.bin
83731ecbb0730b57fe174c3c037ee5f71a71ee31f0bc293830d06f1dbc48a984
pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 17688 bytes
font_01_sfnt_off0001328f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 16792 bytes
font_02_sfnt_off00014aa6.bin
b7cab7cb9f543642169b7166047e43b84ce8955170991907139c613e21a93c4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA6 11100 bytes