Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e1847321030300…

MALICIOUS

PDF

74.0 KB Created: 2021-05-07 01:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce30bf952a91f5c42b66a8fc01f0873 SHA-1: 7afa44afe0e4559fd285774c59ca1db8d0692d65 SHA-256: 17e1847321030300740cb8b277ed47fa00aaa6d6185a9ef7a3ee7e628ef1500a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9612

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://allytemp.ru/uplcv?utm_term=assistive+touch+for+android+version+2.+3
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/b697a6054be5f3f20c46f209a7b48ade/15032333788.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bef4bbb5e---xikilivejubibilen.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f04731122---delotuwijaruvuse.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607aded2d03dc---27527296243.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/ltsqo7s8viv4lvb9s2v2km5rj5/51068123971.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/76eecf2f3cd768a3a421ad7b86ebf576/11131038049.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/3df2906c9c9c4d726543b67c22e5faaf/duvewidadenujisob.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c31f8413dc---wamolisoxogutotijiviv.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/69feca35c8507f7e3c0fd91806d77181/4074022020.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608258beeae38---ronixagojuzadubosedapopol.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a020c763---wudosifevugegigovozi.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608123e536097---41585903382.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ssc2h2fl5v3kld8fgihvbjdpm0/koxivajapoposewexi.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8c721c722e3fac41c25c873c775977d6/jalinivuwiwe.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16074ac52ce7b9---sejazizixaroxidepogomuvap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000decf.bin
19a0a6d6b7f2f1b873264fc8399f4b06bf9d0efac7a657ade0f3007fe3db65fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 5336 bytes
font_01_sfnt_off0000f0fa.bin
093940268c297729739bd0c3bb38672cc1d0674bd5886c5bb848b4143854e754		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 11640 bytes
font_02_sfnt_off000116a5.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116A5 16092 bytes

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