Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f36ff041530e100…

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 23:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8169af34bec7980ee3887da6c61a88d SHA-1: a9bcbe14acf3319f8c1993a2fe78f6ebc9ad610f SHA-256: 2f36ff041530e10015f68ba70ff4b613a9c8558ec756afa4e6073d0b0710b8f2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites. The presence of numerous URLs, many hosted on compromised CMS platforms, strongly suggests an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088357dabf31---zoforatasi.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c379cb1663c---rovaxaponapadowuzema.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59fcca3381---94569061277.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/80fde31f093245167f710699b4d8d81c/gevinakutuzevixobixivijom.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088b028b896d---95913253263.pdf
    • http://adamlegal.com/userfiles/file/80918614345.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c24b94e07e679453283535924a9bbcc/99905087271.pdf
    • http://stadion-zarya.ru/ckfinder/userfiles/files/wesure.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16082213e944a0---91654297388.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/aea2706b54cbab16de257a59c3f730cf/13012260475.pdf
    • http://viprealestatebrokers.com/userfiles/files/konujopebujiwigatalad.pdf
    • http://mousike.it/img_ins/files/73614450706.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16089f5e848067---37903303869.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/6901f0505e280cdf57a19d4bf7369652/7986018158.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/fpl19dngvhmn4lirlgqsjqpede/favidejuzupesepexisixi.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/sujexiwel.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c77b4245f4---pudugowogen.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607714ed08731---94813785119.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd08ffab1be---91197056413.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/2a78de443d4705ad3ae26f564595d6c5/41563001920.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/1nq38r0fb2lc364d921i6crq74/32670864856.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095def7dface---11085732129.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/b65eed744f2a58afa7feff952d8262b4/33168409409.pdf
    • http://studioagronomoserragiotto.eu/userfiles/files/36597663556.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/4533672050.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=did+adam+and+eve+have+sex+in+the+garden
    • 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_off0000f7ca.bin
efd411d3939c4dba4b05c964b5eb123707c96f42ba615688bdbe2de71193bbaf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 19108 bytes
font_01_sfnt_off0001298c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1298C 16792 bytes
font_02_sfnt_off000141a3.bin
f2f4dd30395140818c80e5674358b875ca416c8e90e1fe26732df746776db5d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x141A3 10700 bytes