Malicious PDF — malware analysis report

Static analysis result for SHA-256 9180976ad7c6bf4f…

MALICIOUS

PDF

72.1 KB Created: 2021-07-05 23:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00b1c33af8b8d4d9299d53311f7b240f SHA-1: 27d9f0fbbe6f7df5428eed2b86f53c79dc7d4d63 SHA-256: 9180976ad7c6bf4f36c12d7efa126a08d61267eac8cf0a912a403d3d9a08aaeb
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple links on potentially compromised infrastructure suggests an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://fashioneducation.ru/userfiles/file/87723884571.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/eac3f2911dd232181acfe22bf334c7fd/pojasal.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160792a5864550---xaboxefivazugizixa.pdf
    • http://hyperasp.net/userfiles/file/57767642998.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/k04hh9a00q1om2riesogpntcj4/fereg.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee3a0cf55---5092130329.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/en5lv08bb46q93llic9ut2gdm5/dezibolufezi.pdf
    • http://fairway.cc/images/blog//file/38130825791.pdf
    • http://granite1962.com/clients/869125/File/12169700923.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/181a0b7bf081e7251ddbdeaaa7813d0e/lupepixufekawivo.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ji8tj4kbm1hj793fnckbdl48l1/zamobalavuxajarave.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/4smscv999dv106e0cvj2gvbfos/27700400449.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/tc0492m99aop43rdj4tp4nrb02/14932932962.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c51141a860d---safukirevolanari.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2de0db3be---miberekotedofo.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b877ac636e5---vuvemubutetomipafugixazul.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1d951a4f5befb2fa28a6a9d728a49614/42783357007.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/3eaeb730fed9cb55be751e50b2db810a/75514020989.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160951077008c0---37451506424.pdf
    • https://wecareprogram.org/images/file/2107205247.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d31321c4987---zigozodabivobavotov.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a78ff0ae09b---38507352256.pdf
    • http://bahattinburyan.com/userfiles/file/84467488834.pdf
    • http://nrnchina.com/test/images/ckfinder/files/vafojebibugetobiz.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074d046a14b1---86407108215.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=numbers+divisible+by+72
    • 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_off0000bab5.bin
834760edeba4325c0d7e66ee460b39520dad5f42162f88fcc6dd149016e55249
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB5 15740 bytes
font_01_sfnt_off0000e2f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 16792 bytes
font_02_sfnt_off0000fb0a.bin
47d43be0098b09249401611b4c08315edcd96e6730de7e63ffc7fe152df96962
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10492 bytes