Malicious PDF — malware analysis report

Static analysis result for SHA-256 70754ce225c4a389…

MALICIOUS

PDF

80.1 KB Created: 2021-09-16 06:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1a9d0d345f38625076cde12286c46e48 SHA-1: 6b10bfec195e38b85edc1ae894bc3ff556bf40d3 SHA-256: 70754ce225c4a3894b9851b15e5a82bf2903ad895584895d1db3bcf09c1743e4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. The document's content and heuristics indicate it's designed as a lure to trick users into installing remote-support tools, likely to facilitate unauthorized access or further malware deployment. The numerous embedded URLs point to compromised websites hosting PDF files, suggesting a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1613871af096c7---xufefejun.pdf In PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/tvejlpmqurne5o7eiksnm8luuj/46253782852.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8db1afe42---41491794844.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/69140396276.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613c838489cd3---80587666313.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/96439860896.pdfIn PDF document text
    • http://ondamarinarest.com/upload/files/goperuxupobozugatogitowot.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/nijulevolukonaz.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/87632589088.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/pigiranewiwedetiguvanopi.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/95644458223.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210902100811.pdfIn PDF document text
    • http://bandwidth.aryanpalace.com/userfiles/file/53186213877.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021091605295773499.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/71970940326.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/gudedarabix.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/beranofoju.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/fuzuzaf.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210907095651.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/6128703500.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109051921568132.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/tudawidugusigajaworoji.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/fenivurixe.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/rowanutegobutew.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/bowodaguwojilisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+uninstall+app+in+mobilePDF 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_off0000d6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 17168 bytes
SHA-256: 772ee440a681e078502956df7e4120b47581dd206e334e89b688be34acea3e0c
font_01_sfnt_off000102d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D7 10632 bytes
SHA-256: ad5decc24072e398fc224acf0012f2e75d6d29d9423b558777b4cb9bdaa22e20
font_02_sfnt_off00011af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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