Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e02e8f884eb245f…

MALICIOUS

PDF

69.9 KB Created: 2021-09-20 02:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3045876c320964f01a85debe3ff4b223 SHA-1: 1edc48022d3201a894fa99de25db3ede9427b4ac SHA-256: 3e02e8f884eb245fa55decb39129eeffbfee06069d28cd3ea4c7804b5bebd764
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=pes+2015+download+for+android
    • http://opt-russtd.ru/data_center/upload_pictures/file/58740572075.pdf
    • http://studiodugnani.it/userfiles/files/98308792372.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/d5554c665c366816bd6e92db0acc6224/sefewelorerabuzepod.pdf
    • http://adriennemason.com/assets/files/rosisebademibekog.pdf
    • http://amsaneeraus.fi/userfiles/files/89805148659.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140a36498bbe---gajeko.pdf
    • http://movitecnic.fr/ressource/site-image/files/vetejorejibesesonigu.pdf
    • http://0228339500.kad.tw/kads/ckfinder/userfiles/files/84294583217.pdf
    • https://matfreklam.com/calisma2/files/uploads/81321168650.pdf
    • http://dispensapertutti.com/userfiles/files/84497387561.pdf
    • http://dailyliving.nl/ckfinder/userfiles/files/59285804562.pdf
    • https://rugsinc.in/UserFiles/files/xupuwepudurodifojujido.pdf
    • http://lindendirect.com/ckfinder/userfiles/files/lotidumugufi.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613bafb546deb---85826825375.pdf
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/betivize.pdf
    • http://azizavacanze.com/userfiles/files/28451636081.pdf
    • http://niszczeniewaw.pl/userfiles/file/8378230559.pdf
    • http://ipllaser.in/uploads/66989882893.pdf
    • http://rothemtour.com/FileData/ckfinder/files/20210905_165871CF2D4AEA70.pdf
    • http://allgeology.ru/ckfinder/userfiles/files/vufovadu.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614118aa6d16b---nawugibepokevudixof.pdf
    • https://www.ijdsir.com/ckfinder/userfiles/files/83385251515.pdf
    • https://zippy-inc.com/app/webroot/userfiles/files/disaresoratibak.pdf
    • http://honeycontacts.com/uploades/userfiles/file/tonezu.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/430e66c3a9a18f2e7615ca0dddc32697/2607178777.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_off0000b421.bin
3bbaa56de8a50d703e1c25aaff065177d7bab1569995ddf9933ef608c169e8fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB421 14412 bytes
font_01_sfnt_off0000d874.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 16792 bytes
font_02_sfnt_off0000f08b.bin
08cccaf7f2ee52e4e5ef6aa3da89ab55fc403e81f451e69a8afddfacc697bef5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 10764 bytes