Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fefc4d51f1acb5…

MALICIOUS

PDF

59.9 KB Created: 2021-05-16 01:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4a16e0e9dc9755b303fa0b5f2195539 SHA-1: 3a0ee6cf11a814e3ccecc6f9df0f515f9abafca2 SHA-256: 32fefc4d51f1acb53cee661469c0aa32a53bef5545ed313d879f23440f8f5d0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to compromised CMS upload storage, suggesting it's designed to host and distribute malicious payloads. The document body, though heavily obfuscated, implies a lure related to games or spreadsheets, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://akcjonariusz.com/UserFiles/file/jomepubex.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/82f5b34e70e79f95c167a5a779e9e334/79359302454.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8c7b3795---dodutiluxowutijibojukike.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ji7a6suvpl256trb0g8j2hn821/25713277492.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083768fc8668---79589540564.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/nokiava7f3jginh84isb3crd87/buburatikamodenutad.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/eebtr6u6k1vdhv2rvcjnrpsg34/56574769390.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c63137a246764fc12adb98f9daee7480/vufovifogig.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9cce969e48bfe1f72ee6e26eb71f9a68/15871467022.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a4df40199c5a185ea854324eed97aaf6/8398134523.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f56e88a1f5---64325894770.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/n7jkmp4qsdt230ts9jad1fv4h7/32112531431.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ffff28a6b55cc5ebefc66cfcdc5259ee/vipenukufanar.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9e6419c1c48c4042df02de0ef1eb2e93/wakalalelatijasigo.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/5d3fb757d9ce114149a90817c6b533b5/sirazubizugarojifar.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/buvmnj1i53tsf2559bckqgpc22/48678936197.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=clue+game+sheets+excel
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ef.bin
b0c206531e5283fc8b63e226ef20c199e9409f85c59e9a7356fbacabbc122387		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 5088 bytes

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