Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecab7438a45fdbe…

MALICIOUS

PDF

89.7 KB Created: 2021-06-28 02:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 880e88ee2213dbb48167879b82030192 SHA-1: 3360918d655ab46d867d246625f580205b625edc SHA-256: 9ecab7438a45fdbe2300d0062d7a0431a76c6685c6b5359374f87d304dda4c2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://drafthe.ru/uplcv?utm_term=itchy+skin+all+over+body
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7806d26d0ff0a638f81bc39f289f44ef/93853856148.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7a3c1678---vudixinijufasemuguluma.pdf
    • http://globalquestconsulting.com/userfiles/files/vadixupavodiliturumit.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/pilejavarixefix.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/v0ih3fl2cjneje3sl84r96nc93/35708924900.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/3995c51f4e674c1dba799b25934ebf9b/lubokumigogavajugilaru.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/1f93ee176bf6f0f1e66f14327e0563b4/pegefewutimozegorexono.pdf
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/zafav.pdf
    • http://bright-inter.com/file_media/file_image/file/72158396700.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3a67e973a---85126181178.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b7262b830---fuvamufimav.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kovasajobiko.pdf
    • http://remont-elektro.eu/archiv/file/89381656239.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/3h49o3ovlk8r8bug5qodnlhko3/gowisim.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ee0c88bb4bbfb25f891e37d83a4fa01d/30638658940.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef986b61b2---60510847068.pdf
    • https://emprenderem.cl/files/zovodefuzijifi.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf5437bfcc---27349338958.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/t44vj77hrat2f6qso6bsgppuv6/44723018208.pdf
    • http://caopump.com/admin/userfiles/file/nemesunakajokagadupege.pdf
    • http://lesen-und-schenken.de/userfiles/files/ronosexixonoxumagur.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/i1a8gdl0msiodqcemsuk8mqgp2/badajakakirejevulexinoje.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/3aa0e6db9f7d52a8dc47c9c14cb4db36/kofefuw.pdf
    • http://sushiloverca.com/uploads/files/kofalufumaxaxetitufiketu.pdf
    • http://tumwebthailand.com/ckfinder/userfiles/files/nuwerapuka.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/1e2cf09197c620350c2f6c82f89105d0/nubawutixeluveku.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/narokisaw.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_off0000fd13.bin
df9cba373bff451690d77877604ba7428c94bc60d9f978bfa3d83641f9fd4179		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 10828 bytes
font_01_sfnt_off0001160d.bin
6f45ebbc5f2bbe5df65b1a65aa95cede87c9a243e16fd229c52c4e34121f964e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1160D 16888 bytes
font_02_sfnt_off00014173.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14173 16792 bytes

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