Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f1d4ad2f825e08…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 09:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5ed8e11fd939c3d312d433ba5a1bcb1 SHA-1: 84ef6244bed6592a06333831331ad9e7b7ff39ec SHA-256: 46f1d4ad2f825e08213dc930e277fc67a5c52dfdf8fac807eae18197523b6bda
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and the presence of external URIs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d2339d83581---zaximiruxulenomixev.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ournl8nc3mtabd6pm2v0bh3rf3/78289750458.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/49e27fbeeacb8187db5127b4dcd3a53e/83770900327.pdf
    • https://m-astar.com/UserFiles/files/75558244738.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/025babca1971b62835787e23a78a79c2/78483759350.pdf
    • http://stevis.cz/files/file/18978027509.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9086a53c0---81205928361.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607823c5dde9a---16363395208.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72ead09ed---1504553502.pdf
    • http://morethancars.nl/uploads/edytor/file/86630414872.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6de01bcf4b58655f2abcb227bce60210/dagiwavopazitunomuwo.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/325e4f35c81a64820efe7ff9026a8a8e/34843466463.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/092154b013d81f9874658d027b7fb686/41886099284.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c443a0ccd1c---nosonuzal.pdf
    • http://danfilenemd.com/clients/67744/File/98309772044.pdf
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210616_CA93331EB936B571.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/9gor5iub2ffc29ncmrqsc154e8/wogumopimofenepalami.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e85c4f388---95106801386.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6863324c8fc5fe4802ecd8cdf54a5ff6/tubilot.pdf
    • https://yellowstonewildlife.com/569448917.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1716ff0f---27855210448.pdf
    • http://candientushinko.com/images/file/57870612980.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ethnicity+in+indian+society
    • 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_off0000f2a8.bin
5c2f97cfd43b2e107f4981a638398e7458d52231af5ebfc5ddf372e315c57c39
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 17136 bytes
font_01_sfnt_off00011f71.bin
d4cb2800127ac02a812b181ad5045853fba00c42f3fe0bb7684e7e2d506217be
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F71 10420 bytes
font_02_sfnt_off00013703.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13703 16792 bytes