Malicious PDF — malware analysis report

Static analysis result for SHA-256 22618873e83633fc…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 16:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1d81fc2ea4ddd56488c097e6730202b3 SHA-1: aa85caf6fdfb975ec68b69df9b9b9e0bab7d8fab SHA-256: 22618873e83633fc18715004bfb4e182bb3f496d70cb17fd29009b4250caa7e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7090

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://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/6bf96d78a6f397f444824c4d2e849963/13421111579.pdf In PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/43307a03b7d1c2fc7cff0a5a6bbb5d4e/18304447664.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/birodavapafekabo.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/46422407601.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/pavifodimu.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/dusevitakafodev.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cecfd530978ede8a675f91240ebdaf95/betojovawowiledur.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612d36131ee4f---romogozigawopo.pdfIn PDF document text
    • http://chieucoingason.vn/files/83332230358.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ucd5jd3o1c9evgvrcv3fq01fvc/80164337796.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/kikipusemidavosomuxapoki.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/1uiv2csr215h5mhl340rfu620o/rapometezuwamifax.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112a81ba6448---mukufilarid.pdfIn PDF document text
    • http://cy2hand.com/userfiles/dujitetavefafosuvawu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5u0albr7fsc91ugh712aqr862o/84259737156.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/23893932124.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/zupatotu.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/lateligetufiponim.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b760b0dc84c---gomerujekoxedopixol.pdfIn PDF document text
    • http://www.bash.cl/media/file/99931263870.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/tubusedudavelunegavube.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/13185385e7a8fca320d95ed8360bef1c/77989319437.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/4626898e62b760e158347c95eae9de21/tuvijetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=real+estate+agency+business+plan+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 10976 bytes
SHA-256: ff12ca34fad36ad90afc5d754ef3ff2d22036265a9d8c1de22a837344c900382

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