Malicious PDF — malware analysis report

Static analysis result for SHA-256 0026dc973f732fbd…

MALICIOUS

PDF

79.1 KB Created: 2021-07-18 17:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bf392d2b1dd3f8961c694feb9b6c845d SHA-1: de9f12e7b04d9bc764053ea6e6d852fe2cdb0fb6 SHA-256: 0026dc973f732fbd195eb32f850e815119f174206646800b2cd178d8a8a4abf0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan signature. Static analysis revealed multiple PDF link farm heuristics, indicating the document is designed to redirect users to various external websites, some hosted on compromised CMS uploads. The presence of 'cmd' in the document text suggests an attempt to execute commands, likely related to the redirection or payload delivery. No scripts were extracted, but the overall structure points to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • 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://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/4adc923d6ccaeeaf2a37c5e18b42a645/36481127167.pdf In PDF document text
    • http://iccarrentals.com/files/file/86667629805.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/7464f443da6f0111689d87f11ca65992/16905426418.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/7570500701.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c74b231e---11814078018.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a501e54c53e---45295921855.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vapibapakodozubugibuga.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b552b99d41b---77953209634.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094dcaacadad---sajojalovaxikuzamepu.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/pl92r5na8nhmplh0inb5tm0t72/kovov.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/caakprm3vnjkc5ss7qnupgrmj7/lopaw.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/49748605121.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/fkodcmd5fgvcvjbnq7avdqadm5/87325357761.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/nivijijinudozoje.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d940337619---zugelinoje.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/sebugabatexas.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/16638614076.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6351826bd---gevasokovazejizebaka.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/10895637396.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af71ded82a---duvevevobunoxipasub.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/95013469632.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771dc24068f---runavutarodezidofibanol.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/valamozodejumas.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/36915285.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/59910801596.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/47dcb69dfc150d0ec01dec173dac5b16/nupiniragawakunijisono.pdfIn PDF document text
    • http://bscartridge.com/pic/35181745899.pdfIn PDF document text
    • http://parbatsamajjapIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=binary+musical+form+examplesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 17520 bytes
SHA-256: 7f9e72b1de9d0a211d86a639e3d2d99ea0f9ee40920d2d8dc7449dbcb3e4b0ea

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