Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e9f4f2e3c03550…

MALICIOUS

PDF

72.1 KB Created: 2021-09-28 03:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f1f7ec44ff0444a784023bda5f62f9e SHA-1: b7e01633004d96e1b303827c7ef9d73fee5ab1d0 SHA-256: 80e9f4f2e3c0355067b9419293f5c1ff6902e4798be7f8fba22b3acbb835c969
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://cructi.ru/uplcv?utm_term=demon+slayer+film+full+movie
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/36858671988.pdf
    • http://ladyvenus.it/userfiles/files/13545022482.pdf
    • http://mega.kz/media/upload/files/dusonufuw.pdf
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18720229431.pdf
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/10596064044.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3b4f42033---96472316876.pdf
    • https://xn--lenachatka-57b.pl/uploaded/file/91408030164.pdf
    • https://barrier.exma.cl/ckfinder/userfiles/files/87830165393.pdf
    • http://anquocrealty.com/uploads/image/files/13777588771.pdf
    • https://araprinter.com/ckfinder/userfiles/files/11622713370.pdf
    • http://aj-freight.com/ckfinder/userfiles/files/81383659048.pdf
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94549150020.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614f605b6d2fc---luluvonogeforo.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/960f7ca8e5493e46a911b0109d992860/rijixitijeweta.pdf
    • http://cargologicru.com/sadm_files/togawedejiburavinepa.pdf
    • http://legalinet.eu/userfiles/files/zupuxemejav.pdf
    • https://reha.bg/content/upload/file/4510284616.pdf
    • https://petpetmates.com/files/editor/file/83066892907.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebba5c8b8a---87716925549.pdf
    • http://xn--nellieskche-0hb.de/userfiles/file/zejapajotitutibigu.pdf
    • http://gelikonline.ru/content/Files/jolekavip.pdf
    • http://metallpress.ru/files/supobopaxeluguvakek.pdf
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/64587431072.pdf
    • http://isystem.hu/userfiles/file/19592496761.pdf
    • http://minhanh.com/files/fapovesulanovifigepulu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off0000b5e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E7 16792 bytes
font_01_sfnt_off0000cdfe.bin
70cd2e3218fa16320194c5d56f720f5a8b684cf7b07012024a46619ef570a0fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFE 10560 bytes
font_02_sfnt_off0000e611.bin
11a2ca30f1df7e658316dc8bf7a8161445d1bf78b08179a94dadaacf3b304d7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 17356 bytes