Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c60eea71576d749…

MALICIOUS

PDF

76.4 KB Created: 2021-06-25 03:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed3ec71fedbdabf36e127a281446bf4 SHA-1: 9babc7194bdf5e3352862fa214281b2e580f0fad SHA-256: 7c60eea71576d7490efc9b49a85a25aef82a6266c0e19a1910d1e7e812d90f0f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing trojan. It contains a 'clipboard command lure' heuristic, indicating it instructs users to copy and paste commands into a shell, a common technique for downloading and executing further malicious payloads. The document also hosts numerous links on compromised CMS upload storage and disposable hosting, suggesting a distribution mechanism for malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e9f605b9---vaboso.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/4ad57d946e7d4e614ab501e214496266/demekumurorerafejegenu.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/68cm75qvejbmc8102m71dp0chv/rugagojazefowozexuweb.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5607718a0---jasorakad.pdf
    • http://chroscina.com/userfiles/file/pumabuwurar.pdf
    • http://premium-h.info/files/files/vudiwaruzoku.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/66987065162.pdf
    • http://massageindex.nl/images/uploads/33214090376.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/053841abb7174ac633021a630972598f/52738707174.pdf
    • http://hurtmar.pl/Upload/file/74389590172.pdf
    • https://luyenthitoeic.info/userfiles/file/bagepasipimi.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/jr1vi6t2dsjjnuc8n6a6io0skf/7101692388.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/kdk6jvdqg4frpe4l913io1l537/67433740359.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160781d8e4a649---33311492717.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/51913fe9c78eee5c2ee65f65285a03de/74016558838.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ubuntu+make+usb+stick+bootable
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed89.bin
afc7fefd9baac86594fa557327b6f43f5466a2d4cbd3a502a10fce265f0f5984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 5044 bytes
font_01_sfnt_off0000fea4.bin
eeaf60ebc2b61071ec868220238efbfa75eeaadc6294ff9ddc0a6bd6d2e262b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA4 11172 bytes

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