Malicious PDF — malware analysis report

Static analysis result for SHA-256 07df7d281f4e384c…

MALICIOUS

PDF

92.9 KB Created: 2021-06-26 22:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b28724e094d267bac0e5a9974ee13b3 SHA-1: d5947715d9227563393b01e420597fe2fdcaf636 SHA-256: 07df7d281f4e384c95de46ab6e45f23a1d3aa2e3259958c1b086a6ff8bda2f19
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be luring users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://wastran.ru/uplcv?utm_term=abimelech+and+abraham
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c022949141f---minovato.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/cf347862d9af59f923b71509b6ae9c7a/mezeme.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a01601d2dac---wukonupokirubupufu.pdf
    • https://bikeid.net/ckfinder/userfiles/files/wujefuz.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/93e7c1e203f4c8a3ca2445e09000f383/93769586380.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/9a736d1800267b7e29e339e91e9ca2c6/xogukilibimife.pdf
    • https://happycolaborativo.com/uploads/files/legubudajawesa.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073df29db431---53464050168.pdf
    • https://holocaustresearch.pl/nowy/photo/file/71946514813.pdf
    • http://sllight.ru/design/img/upload/file/vepirifazarotulixu.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/faa1c44f8c51016c6cbd919e6e7b7207/69834175369.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777a3b1c55c---21792307395.pdf
    • https://cleaner.pl/userfiles/file/viwanasurawerifum.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/4f8095e174078438942bcd174687dd4d/divewowakigaviwamix.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dc05e28ff---97471707191.pdf
    • http://businessvaluationapp.com//fck_files/file/1684190545.pdf
    • http://golden-candies.ru/webroot/files/files/61956011981.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160859abd80ccf---monel.pdf
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/fugufesoxowad.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078284943f0c---3953104723.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf6e2c589---73346498993.pdf
    • http://inlygiaylynhua.com/upload/files/numigetudodigilemabavuw.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160965fe9d3aa9---kojifawovoferotivipifagu.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef37.bin
d26d7decce263215e85329e8cb1e6b9d7656c47c9d8f645d26996f224dd53d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 16896 bytes
font_01_sfnt_off0001079c.bin
76216641ef71cc2382cf46d2293ae04d5f36625526d67485dd6b714e09b1e33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 10372 bytes
font_02_sfnt_off00011ec5.bin
94cbf6af4b5b737253c222a1ae73232d476836326c4e96a9fa90ef2662ba2e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 18308 bytes
font_03_sfnt_off00014dde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDE 16792 bytes

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