Malicious PDF — malware analysis report

Static analysis result for SHA-256 1794242330ac1a95…

MALICIOUS

PDF

82.2 KB Created: 2021-07-04 13:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a7b01cef9f78e1eedcca837498a43f7 SHA-1: 8f7bb7265a7f4d3328205c81c8a184fc03eb9a9f SHA-256: 1794242330ac1a950147355c8be11ccbf08ea1a0fa52fdb4776209fbec99da0e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c748be7ea19---30111464690.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d39228979ed---51308543475.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c5f439d38---31819234971.pdf
    • http://xn--42c1dhzaq5aeb.com/userfiles/files/xososozugigud.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6d643dd9baaf9485ea4b3922cdc88d0b/1774977783.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082b34f0fad1---nesiwurid.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f911cd4354d5a9af59162a37b34b850a/9103386946.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/xaxixitapuz.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840f834496b---zakivefadilijowasi.pdf
    • https://raiporjai.com/piceditor/file/jumivigu.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7t0frn3lkkuare2gg51q6p40o0/teruwupesusofot.pdf
    • http://www.halpellet.hu/userfiles/files/xomofavapef.pdf
    • http://aihyang.com/userfiles/file/fanevufemajufilivosadi.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/04d3fef1d08d4a047d0edd32c213f232/97636159280.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3559ae8ce8---61205246500.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cccedb2b227---27686351030.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f2514403a3b3c18e69d4401cb6e38126/9428762402.pdf
    • http://yucehukuk.com/resimler/files/pixetepuvaneborixipobo.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/kfb55f1q37t4t3kmhnp229ienj/nodefasobotesefoku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=love+sentence+too+little+too+late
    • 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_off0000ddce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 16792 bytes
font_01_sfnt_off0000f5e0.bin
471def41181cc38affd76f91749638cfaa2689a3ba380448ff73a09abb4c6d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 18196 bytes
font_02_sfnt_off00012517.bin
8289d41e50d037f005bf62c38e8c0eb0333d05b4fc7bb1bc4940ed91877a2df3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12517 10144 bytes