Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d92121af9f81016…

MALICIOUS

PDF

89.6 KB Created: 2021-07-02 18:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cecb5342cb0531a884e859e1c1338db8 SHA-1: 14cafdfcd4f49dd9a390171b209c46435fa3d755 SHA-256: 0d92121af9f81016cfe727e5a4c1ff556593f3e9db4f5b92129df6cb41272f06
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of a link farm suggests the PDF's primary purpose is to redirect users to potentially malicious websites.

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://medvor.ru/uplcv?utm_term=cheetah+facts+for+kids+pdf PDF link annotation
    • http://astro2sphere.com/admin/images/file/38127871527.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/jaduwexeposipezopudiru.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/wogukevizumexovepe.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/9296931887.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/fpcmrldkcd1ujdlmoopu5er0bd/98256709356.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a47fd09e527---36803571359.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/v40rk7ouptqbd7blljedb1afm4/87972475190.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f13b20f434d39b7df7faae58c3df7d89/kazeji.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2mmlf51515n872sihad6t4m4ah/16275796265.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075895bbeee4---gixusubikexititeju.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a8903c0e72298cdf9d0afffd04fd52ba/risikuretobafu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dea8fd69cb0---rujejesetigas.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/gubefapajenajoxobikuwos.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/41b9beb70eb335d8826e3023c49373fd/20479339273.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/32313254609.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6fdfb9173---zukivomajasupuzivof.pdfIn PDF document text
    • http://becucci.it/userfiles/files/dawazonug.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/f237cbb1a48fb183da3ef763a029045b/66572940113.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/6apolh1ghn4m9cggajg57edb70/36169513839.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/c6643ea8bb9616f353b0d455e52505ea/kanixafikamoregor.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/16120698011.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/15fd79ab7dc32191a7b079abc49eb6da/puxafixebidagulobatafe.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/xegikiwiwobagufe.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/64720673417.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_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 10692 bytes
SHA-256: 47295e998708459f8a298d3f49fbd96466d7bf8280f97f96c21c0ce0a08e577e
font_02_sfnt_off00012bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC6 17524 bytes
SHA-256: af5af5fa81e3d9fb6579f7ee2e798c19ecd505c3b23815e5ae2f0f6b9169a7ba

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