Malicious PDF — malware analysis report

Static analysis result for SHA-256 58452bbf05de19b0…

MALICIOUS

PDF

69.3 KB Created: 2021-09-06 02:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1fd6feae6e723c8a7e778dcb6c7108ff SHA-1: 1f4e09472c729ccf32abb4e79b23b404937da4df SHA-256: 58452bbf05de19b0e1a6893d0d9cee1db97cf5682e7dbbe87cf9182ec3aada53
154 Risk Score

Malware Insights

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

The PDF file contains a link farm directing to numerous external URLs, with several hosted on compromised or disposable domains. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially untrusted hosting suggests an attempt to obscure the ultimate destination or evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6701

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://nowator-zpu.pl/userfiles/file/75131203336.pdf In PDF document text
    • http://apsencollege.org/test/fckeditor/file/28610940819.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd309b3a2c---28672378928.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/delutorawewofaf.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/72947299374.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49452322291.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/48918115468.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/4985457967.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/a76a2fde732fc2f050854de59fb06e75/tufixuwadevukew.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b5fd6299a6e7b3aaa7330809b40aa6c6/kofeni.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/78862998d7bb844a69603d5b83ae95d1/63996240017.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf06d93c48c---xusefuzowarex.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/64102826285.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18581ca7f---tonovewupo.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/31843225495.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/11391030292.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077e548ba8df---14186750338.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a982ab6b13---firufosafitiforatawal.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/vojuja.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee60fb8353a---30999051929.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/gixoni.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/xikipafijomarefufixox.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160789b3f2a970---xorexujijijonurala.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=learned+optimism+by+martin+seligman+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_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 11052 bytes
SHA-256: 7e8bd8d3e35519cf784bb61e297cf4ebe21bbc5fea2f66567907443d803a0f64

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