Malicious PDF — malware analysis report

Static analysis result for SHA-256 235024ecfbeeb9a5…

MALICIOUS

PDF

97.5 KB Created: 2021-07-04 07:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09c50442b62bc69612c9a3d9d47c63d5 SHA-1: b9f519f803741324209329fb2099ecdeb3f9bf4e SHA-256: 235024ecfbeeb9a52cc15da4a955eb8b149a9596acdcf41d115962d902da6fd4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a6d320223---vudizudorumitapezaf.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160cf172fe3c98---nekokilatapetudosewijo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5dp7urnatufkoa7eaea9mc8f93/pulisixatamagezamejeb.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a3d21a487---6121405862.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6d39ce443d1f2bd3aa5b1cf10dccc26c/23300249170.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21e3490b93---56490172844.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/igt683fd8dq0tk9kq64qfnsvcb/39983753568.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/f9d26e51a1d05a0012a99b354c008bee/lilagogoput.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160868c52af060---85830733705.pdf
    • https://dentalrud.com/userfiles/file/19577843941.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c367019da---rezobomotumesimem.pdf
    • https://marljivo.hr/UserFiles/files/vulisanu.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073e9342bb8a---63592296725.pdf
    • http://guojingmall.com/userfiles/file///lizajegosu.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ab7e5qoabgsuulb4ani7m3jine/76354006666.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa8ea0b55---14305715009.pdf
    • http://kovacsoltvaskerites.hu/images/file/74761788591.pdf
    • https://anhhuynoithat.com/asset/files/tirovu.pdf
    • http://agendatourvietnam.com/hinhanh/file/mopadekada.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608446ab81cbe---votixomofobajopaxaxajeko.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d81c4fd2---jutetilujajuratinikimeji.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a56b8d4cbe---71195971352.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/fddf801a0fd77aec62a39db05e690f77/21833459339.pdf
    • http://ash-graphy.com/userfiles/file/moweputumufujaki.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a232351d926---61082462273.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=market+and+competitor+analysis
    • 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_off00011b33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B33 16792 bytes
font_01_sfnt_off00013345.bin
b3b229fe704882977c20c571cebb664dc04bd63d13a13bf3b56e9dbd206efca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13345 17048 bytes
font_02_sfnt_off00015fbe.bin
e9385204e24a7757b26360b9b18fb1d3a01f2f36716bb1cec1718842165529ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBE 10876 bytes

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