Malicious PDF — malware analysis report

Static analysis result for SHA-256 792069f9dbeeb2c4…

MALICIOUS

PDF

74.6 KB Created: 2021-09-06 07:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 92449955f04946eac3811b0978f13856 SHA-1: d7adef357b871f16908d58ac8851cf5fb2ed0061 SHA-256: 792069f9dbeeb2c47e4600008593621b20c9bfb10922b413c73fd3a4b06916c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It functions as a link farm, with numerous URLs pointing to external sites, some hosted on compromised WordPress installations. The PDF's structure and embedded links suggest an attempt to lure users to malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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=2016+honda+odyssey+special+edition+owners+manual PDF link annotation
    • https://tjpapigroup3.com/contents//files/76552653797.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/45877647285.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/2524640403.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/dezaxolizom.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/bd36788656742b0fa67afcc40efb92e1/tajodob.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab49859739---vapimudufugo.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/2b6e513222b7fdc47aeedca8d96f5fc0/vefotubelurozewaxowukif.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7a2421ea59ce8e4cd935a329c7c9c7fa/22566464117.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/nonopevidexukuvufe.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/62047143324.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbeb8592679---samejalajowalule.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/522f0536a26b233fb85a0a8396dada8e/lonamawogutazo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/291844402185.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/lubaxukewuxojukuta.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160750842ab041---lobezemudezil.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087cbd99bbb5---vadisazagob.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/tobadozobu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608503aa49ab6---24022405579.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/9938612809.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/12105442d9372333c8e4d65e3e84a9c6/31718994971.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/17c511ff2ab27f335357f3cfc11eba5c/rerazetugotigonitamoboner.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/iselni2f1tl4cl70iq1faaem5p/72829607190.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_off0000b826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB826 18364 bytes
SHA-256: f0efbaa5e847f4a9ab9b4f7f0895ef3218cdf7759446cb52f904d3211202f3ae
font_01_sfnt_off0000e7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 11444 bytes
SHA-256: 41703cf40c2625e2dadae0626d4d9629c1cbbeffd5efbb7828513ed5752d73b2
font_02_sfnt_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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