Malicious PDF — malware analysis report

Static analysis result for SHA-256 25406308443398da…

MALICIOUS

PDF

59.7 KB Created: 2021-06-02 09:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 812a2f9e2d989c88605436ce78c29643 SHA-1: a45bb458f586d42cdb1b7d46114f904422fb137f SHA-256: 25406308443398da42e49a293e37257f7fbfa4e1fad5e5d14cbc0f1b0091ef66
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9559

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://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e653244b---23819728979.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf26d8bc6---58722701538.pdf
    • https://foundryindia.org/userfiles/file/darowapurizemama.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/31b19388864375fa09a6413748674455/lerefenejigosupetepebiku.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ebb6c04afe29e451bb2b6caf189356c3/fipigenimojaribuxagelumu.pdf
    • https://deltagroup.bg/uploads/file/5821063188.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/5f3f9d14e0e6649f496625e06911c37d/93027406367.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58e12908e7---80277187704.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21125bca5b---15560685903.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fef064645d---mevaroxadefosofeb.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/fb7e2d3fe60c41489cd76e0d75041dfc/18678962791.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe027662f---kewarulujejanafiraxis.pdf
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/wubinelifur.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/cs65c04ifa91phk2ovcsn84132/jabuwuvefe.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/imre2f4m3je8si7sikrv9qsui1/80652944364.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b6b9e033---funufobawutaxodufelis.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d89a3e5a8ca828634aaa3380f6b89df4/lorodivokexuwafovifoxewag.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/53d4e0fde33104861360b9a14c82714b/lubamogemazukalemire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=joker+bathroom+dance+music+sheet
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee3.bin
db2785ddd76161d6851f14933005973f5ebab30dc9b3f11131ec6baac56f5673		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 5340 bytes

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