Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9dce613c4107d05…

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 16:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ed463963212ea22ec7efcc2a3336fc0 SHA-1: 1434c17a8632265a66651011339e069c70224c77 SHA-256: a9dce613c4107d057fd65b2749730706c3cdf0773df2b390bf71f77b1773d5f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting it is part of a phishing campaign or used to distribute further malware. The presence of these links indicates an attempt to lure users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973f9b0d920---58421173584.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b6b253f5ea1d28609768c8a99c035dee/wogavedovomutarexuwaduk.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609e547a897fa---97527672603.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/187c462b589c3a82877b32e41ada3c5b/jubulopavi.pdf
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/zisexirat.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c2ebeeb43---61984911901.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607244a1a06b0---53948638491.pdf
    • http://evohome.pl/userfiles/file/ropumanukatezasikurekakix.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160786f0194824---11873390178.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/eb0c79a7f5cef976317748775b4529f4/46187201728.pdf
    • http://sl-light.ru/design/img/upload/file/seliwobidevunagiladuj.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/1128e319d2591ab4929b0921563c7a6e/22065883641.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/1ee43fa5f4ad6580b2e17ea85ca91f34/63914891371.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a19a26a502---23228061293.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/ginaguwaxizobox.pdf
    • https://blindnow.com/userfiles/file/liwes.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/b810d6780842a201dabc6bba02da259c/gawozemewedovuvor.pdf
    • http://al-bandak.com/userfiles/file/zerosafenosag.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073b6c1395fc---11130034056.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160846bede57c6---55518171337.pdf
    • http://aven.su/userfiles/file/kezabik.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160760b9b4f097---2690371395.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/8efd5628b5b0272db3cf71371640f794/rataduwogujik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=time+alone+with+you+sheet+music
    • 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_off0000f667.bin
c2ad5a4e90bcdf4874c6a93ed1fca2b7dd111148f501e00c156410f7eb962f53
pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 10656 bytes
font_01_sfnt_off00010ebe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 16792 bytes
font_02_sfnt_off000126d0.bin
e448ad90d3f2668d711b209d30a94ca977d159802d34960dc5081f6456bf943b
pdf-font-stream PDF embedded font (sfnt) at offset 0x126D0 17216 bytes