Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5322afcd21e8b38…

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 19:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0b1f21da07ce4953378fed04b8fc986 SHA-1: 1649216a96c6b540f43abff72f0d51d6116214e6 SHA-256: c5322afcd21e8b38e986c484460d5eae8d27c515918b830e360b146297cb3ff5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, and specifically identified as Pdf.Phishing.Trojan by ClamAV. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the presence of many external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/83f9f87befd38bca04cb7e213e09d67c/4200909577.pdf
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/futipiketuwefazidita.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa7e3c9d2---gopemera.pdf
    • https://implant-drill.com/userfiles/file/gokajixox.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdc3fbeb9f---taguxexodapobekimeso.pdf
    • https://atlastoursntravels.com/userfiles/file/96366783237.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608efce81f9b2---14551116546.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/dbba6af9bcbebc75aa2b9bf2aa32dbaa/sitip.pdf
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/pexewemifo.pdf
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/64482544650.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079db19bd6ed---23334622887.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/3abdc705e7333427a13a2c8eef2e2af7/64508584959.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/b9d0a3a1c93f741ad2aec8340584a61f/xolowuwowa.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/0p0stubaiavlr9da99pk6hsavj/89137951019.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfe3f5c958---sumudituxofiso.pdf
    • http://healthywithhart.com/res/file/ximeviguvulebugemaxanu.pdf
    • https://rowadalbyt.com/userfiles/files/93735396883.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b5abbb5f---62109326753.pdf
    • https://leosservices.com/userfiles/file/kuxivife.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acbefbef304---70335450849.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/04554eeca46fdad2a64d4f0affd3cddf/78154057037.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3177393461---piviwipogogugowilolem.pdf
    • http://grawerlik.pl/userfiles/file/kugowugul.pdf
    • https://askisan.com/upload/ckfinder/files/kanoto.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=benefits+of+total+quality+management+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 16792 bytes
font_01_sfnt_off00010f26.bin
7ba377dcc1ee0b6c323fdefbb33f242595dda950ce70ce9603090a4ae68d9758
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 11152 bytes
font_02_sfnt_off000128be.bin
e8e90b503789a1c1ccdf71bb28075086db40e1a2f7356361efddb76090432db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x128BE 16484 bytes