Malicious PDF — malware analysis report

Static analysis result for SHA-256 2885de4ab75fb0cf…

MALICIOUS

PDF

77.9 KB Created: 2021-09-07 12:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bb546f122d87f9ba44f7da7df92df260 SHA-1: ed90a132eb441c861d85a0b537a80742ba366c6d SHA-256: 2885de4ab75fb0cf9802fd93f6bf4770ebce6faa114f6e79b83e4efb6900df9e
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8507

Heuristics 5

  • 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
  • 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://kitapkaplama.com/upload/ckfinder/files/zinesut.pdf In PDF document text
    • http://apsencollege.org/test/fckeditor/file/rinixujelabuv.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/bepiturotogumupidom.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/59554907709.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e075820bca---75352582215.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079304ab892a---rojefafiviwejizunufos.pdfIn PDF document text
    • https://proia.bg/userfiles/file/fovewibakifaze.pdfIn PDF document text
    • http://tid.vn/upload/files/nabanisunowezoxotununege.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac35bb91ca3398d6a859a20131c9893b/43988829232.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160778069281b4---tarodimamojo.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/2281982856.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/bisamugitonepixokunowupej.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b711319eed---nubojusofodijatepi.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/golofepulexozejimokozetek.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ast1ge1114tp88dik0n6hg222o/borom.pdfIn PDF document text
    • https://numberonerevolution.it/file/31088535628.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/48934497270.pdfIn PDF document text
    • https://777mto.org/contents//files/66438280542.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ff61a59d2---12378842413.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/dekibuzexafo.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/f1bc3acb055bedf73261b455b8935344/76379253040.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/mesumigusorowom.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1612191c8397bb---pepuxozamefabirarofad.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/vozibukupoxedubewegomat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=complete+keyboard+chords+poster+pdfPDF 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_off00010699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10699 11064 bytes
SHA-256: d406486370693754815f72a2acb03ac71d79de8cbf1ede48c4bd2835125ca4ad
font_01_sfnt_off0001203b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1