Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ce4d43e00c7b69…

MALICIOUS

PDF

90.8 KB Created: 2021-09-20 15:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8d2ca158f35d14ceb56566bbc83e3a68 SHA-1: adf93279353c24931177ea090d198ed2c6f2f401 SHA-256: 22ce4d43e00c7b6916deb687f52c494bcf61e093fb02504a048b25123ac18ecb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it contains a link farm pointing to potentially compromised domains and a lure to execute commands via the clipboard. While no scripts were extracted, the combination of these factors strongly suggests an attempt to trick the user into running malicious code, likely a downloader or backdoor.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://fasson.vip/images/editor/files/84054478028.pdf In PDF document text
    • http://www.galiantsolutions.com/emailimages/file/75878382202.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/vidijabufedix.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/jovus.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/36830888844.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/lusozazenamejofuzojilopaf.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139988a2af69---60348729020.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/94404812305.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xogebudifosisekeve.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/dikifojipozobuxejaguwuxap.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/38330220220.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210920171032.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/zozugujaboja.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/0dik637ttaiorb42s4iof2cjeh/sojogi.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210901215237.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/1n6mp883aeb4b8mugbbr82n7pj/58883538964.pdfIn PDF document text
    • http://attilacenter.org/userfiles/file/78311397598.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/sevidomigokur.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/47721566397.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/givojefixuzixepopanezeki.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/67097906239.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/2533701743.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ftgrr6lbnoj4v6cj8a5rul4s03/fimozirinazolovapezufozes.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/zagizuvudipenewi.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/18874941551.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/lobizapulapulazobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+run+java+program+on+android+studioPDF 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_off0000fb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB76 18520 bytes
SHA-256: 8c15c944a12ba18645d90d7202b6988152db87d07fad7c5828c637c37179baef
font_01_sfnt_off00012c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C11 10932 bytes
SHA-256: 6b91056d7b1cf0089436faf8b82d526a6d9216effa37427bd432060fe5647685
font_02_sfnt_off0001452b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1