Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ac7f3d5513de6d…

MALICIOUS

PDF

64.0 KB Created: 2021-09-02 01:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 954869d06ef27616cc7d5339a478b3c2 SHA-1: f47593d09a378a3fd00ffaa0d151fae94beeb243 SHA-256: 46ac7f3d5513de6d0b5fb234b217964a81902233fc7a2b2b3247d7596402c130
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9683

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pytextiles.com/userfiles/file/68644531693.pdf In PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7d846ba511---86202811309.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2e0fcfd5d73d574670bc2bd61e6965b4/tixopu.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/mafulu.pdfIn PDF document text
    • http://coffee33.ru/archive/file/bofukukebipenesafofoxib.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2056144f1c9d0e999c1b14a4a90529f6/34783514790.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075ecb767852---xevuketekefiwoxedalilu.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/toritabupap.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43beedeb08---kibibumibixivuv.pdfIn PDF document text
    • http://vickerycarpet.com/uploads/images//files/63532603530.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f141e74661---30956311307.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/paokqmitjolo3kdh56um77clq3/64325355787.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7620df3c5e---83394938641.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f42a337dcff941a5546ca1546588bcbd/78746963823.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/52088473400.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/tolikuwuvuravinajunojusiv.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/08/files/210830152633.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad276fcb5da---77574887395.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/kenirudifomog.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710a79d8023---394310921.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/nurizinegawizufemaliweweg.pdfIn PDF document text
    • http://carszana.com/image/upload/File/59237355241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=guilford+jail+rosterPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF0 16160 bytes
SHA-256: cdc69525fc74586dc193ce664641c040d0f8c11661107f664aac6feb3b7e83d9
font_01_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1