Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e288685c22d0230…

MALICIOUS

PDF

87.3 KB Created: 2021-09-19 03:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c770e0b78d052935ab1c970f25738cd SHA-1: 7f64c094c1064e242630a3ceb86e0f67a65eeb20 SHA-256: 7e288685c22d02302595992cc2b0726a58d487332483c4f3e135cc3b700f68bc
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan-d2568dad23a94d95. Heuristics indicate the PDF contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of numerous URLs, many hosted on WordPress sites using the formcraft plugin, reinforces this conclusion.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3165

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 http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613909b340074---51914647554.pdf In PDF document text
    • http://dienvietbac.com/uploads/files/surugotugesozef.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16136f506b3a45---90376331222.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/vufadujolijowal.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16141b5cc53d35---gopuxarukeboxanup.pdfIn PDF document text
    • https://aedwea.com/upload/foto/37473337857.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/sebasuzediluman.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/62659889097.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/givepe.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142b1d7c40ac---tibolijunabirodosebuti.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/45147817162.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/vekapividefunepax.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/kukewipan.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d17652f51---90350709776.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/52031969841.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/lofuwenalatezin.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/vaxexafilos.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c7f3bc7d9---47286151682.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614654822aaa1---sarapax.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/6394678555.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/nugiwukonapamav.pdfIn PDF document text
    • http://generaldistco.com/images/file/pajixutosipagadakowol.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136eff109bd2---pusuwogiwozemu.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/wodosefakip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=free+robux+usPDF 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_off00010956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10956 19260 bytes
SHA-256: 644ccfb55bd4c915f5d1562aa36eaed2f49177cd54a027974c704b018046098d
font_01_sfnt_off00013bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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