Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80b6fa5308e3d9e…

MALICIOUS

PDF

88.5 KB Created: 2021-07-18 06:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3a1d72ece3aaeb1a45c5c89101732603 SHA-1: d33f7a9842afda7e7b1504dbba0390bae3d0a24a SHA-256: b80b6fa5308e3d9eb0c7bc0edf0b4fc097e19e5be8555339492e57ec49a43a82
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect the user to potentially malicious content or services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f9c81280c---4009332125.pdf In PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/aav4s5kbng2gr5q07unr2nmojr/11183583841.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/77d4f270f5dee087dc3212ba9093ce05/resowovowetokodekojadax.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/01115959463.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ad2b62b3---73547356549.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/xupefokonewumevatilex.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/gudulevowemaliwimekawabej.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/xipomapopumesebunimirapep.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/agimurabisawixipumageli.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7436aff62ace7f3b4d805ef62d01f10d/43454917082.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071a4e34eee4---53366749056.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/04ee40e9341ca8f5caed2caacfb24c8e/baraxevagupejawez.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/vixopiruw.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8a322677f---37117051660.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4a49cc3f9073e55e907e2c7f3d44d591/96176121158.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/bowazapamarox.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/tafabebatilimop.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/62091285878.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/32932278173.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609670c7bd63f---dupupugojaropewaberatax.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2953f0487049902e72ca0d77c22f2e10/bosazivepojirikir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=nm3+to+sm3PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 19772 bytes
SHA-256: df1c25245248e8fba96f8353dfe372374354541209ffa9b1740452a5de9cfe86
font_02_sfnt_off00013ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF9 9784 bytes
SHA-256: 58f4560b7d4f77c18e48fdb91af1baa373b9b4420ed458bc95efd138de13d8da

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