Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d9576c78e8afc3…

MALICIOUS

PDF

80.4 KB Created: 2021-08-22 00:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 70af7a5f379c0a51ecca5efd4a2844e9 SHA-1: 31518873ddae34dbd8ef016068a1919d31882e2d SHA-256: 32d9576c78e8afc332b3622dde00bf4a46a55c1ed50c676d4ce42c4068abcdc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6200

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://allytemp.ru/uplcv?utm_term=how+to+play+donkey+kong+n64+without+expansion+pack PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4u9okstdmr99br8nci4pl2vvt5/78048459095.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a59b1230c8d---21655609414.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/tafupedon.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/45f31dc1bf34d5b960bfa6ba03923517/norome.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16074325c8e5cd---gasawebi.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/dabetaduxadir.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/8d2b1df2fb004b4e3af148b0c45d4a79/90335745936.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e493caaa6a704f6ada202596e7bd6ab4/46209333841.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/9726696943.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/laxomagefezuna.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/jerolili.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/bt4bma9jtktofuecak56b3e2tt/23684834325.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/difebejugiwasafuriwuzu.pdfIn PDF document text
    • http://better-pharma.com/images/file/files/80534802659.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/sebofutujupum.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e04ab469e---32852627274.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/17164094841.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/68ff9b0fcd3b7c55f1eb32e3e0dcc86f/71957938792.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/78b2bb454c09a124307e1be476eedfe5/mexeluvidizibovib.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/4954579883.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610857d1a1624---7960699172.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/gunufeworibosafovep.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5er1e8nvln8mpbe24eq75rb5km/kejavuvolike.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/60024786556.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 11424 bytes
SHA-256: 6edbe7f8b0f0f0973fc56f73ab915b56d920b63cbf4e611bf42210dffe0e8292
font_01_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 17276 bytes
SHA-256: 8fcda34c8668cf71514668080b4cfc9ab3ee4f25b69bf18aa54481dcac1f29a4