Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbec4d45b2bdd16…

MALICIOUS

PDF

91.8 KB Created: 2021-07-23 01:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 851ce10c37d1220fcd75214f5e310950 SHA-1: e4f059a3dc624b592252d995d4a145efa03bc391 SHA-256: 9fbec4d45b2bdd163117b686c8ceade5a2aa9883bdeee74ae75a46224d9c5d90
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised or disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3833a4b2---gimupisajusubavizexif.pdf
    • http://onnetsolution.in/userfiles/file/12171471473.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7401c3610---7288009726.pdf
    • http://mudrkanuch.sk/editor_uploads/system/files/gufimukilediwosigaxireze.pdf
    • http://dientrotiendathc.com/media/ftp/file/68876685930.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a4fcd8151b378d65517bd52a2ca6f646/99905487005.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c69cca24c---36986476354.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c16ef765bf0---13604378214.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748fb4607b8---79038596850.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/ecedde72ff40fa52c79cd5a1dbdb741e/dedepupegud.pdf
    • http://scandirent-new.ru/uploads/assets/file/52040208916.pdf
    • http://gwhs79.com/clients/867100/File/sapasuziwudakifuda.pdf
    • http://msslink.ru/userfiles/files/tupakifutepike.pdf
    • http://dioceseofniranam.org/userfiles/file/27287672439.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898aa25e72c---97936125424.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6df1d3abb8---patuge.pdf
    • https://leganordavigliana.it/uploads/file/28335671388.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/6ijmmvribqmg4f6e5beogjap2c/lulagaxiwidejaluz.pdf
    • http://pi-consulting.ch/download/96942921906.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a696d19b6a---32622491396.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609887ecd0d4e---16386423530.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=hummus+on+a+bagel
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 16792 bytes
font_01_sfnt_off000105df.bin
0962302e6350164e47961486b663d50fe2659063985870b5493919be6388f5fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 17588 bytes
font_02_sfnt_off00013426.bin
9dca4770eec406b35101386852a1f0a0fc03c1aa002aba2ea560d99c26426b14
pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 10392 bytes
font_03_sfnt_off00014ba1.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA1 16312 bytes