Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60cafa58feaa98d…

MALICIOUS

PDF

86.1 KB Created: 2021-07-01 16:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10f5924d677ec44db94ce8dc232b3b7b SHA-1: ae0468ca58a43cafab4a19dd1bfc0bbd92b7c272 SHA-256: b60cafa58feaa98d6e80d17a1386e37bc97ef4783d9fef8941c046548d08f04f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the embedded URLs and the nature of the PDF structure strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/7f00d1084d487fef591e756eba43871d/61304176523.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160775c1b58780---fugufedovowajarebakelom.pdf
    • http://tootingtaxi.com/survey/userfiles/files/17409312157.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081212cc06b9---banaxas.pdf
    • http://zaun-produzent.de/userfiles/file/44795570814.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607844ef45f6f---72691969482.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608416ccdb07b---legasiderigosivuvun.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/8q659830d78g4s9250319l2kfm/rifexuxaniborepivasowo.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/fefemigikirudedakuz.pdf
    • http://anoh.net/pds/userfiles/files/91076406796.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ir9h4i6140dh4uturje00q7qpf/vorefuforojovuz.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/96f95203837c0ba05960b46bde1bd527/14229492764.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a024d42e571---juxadumamoxipejowipubul.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1073ba08d5---fikisel.pdf
    • https://torgradio.ru/new/files/file/19270227594.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1fb56c65f---87689565755.pdf
    • http://chinoboxingclub.com/clients/36032/File/vilonagon.pdf
    • http://rentaruedas.com/files/others/14661573100.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/d1023a47dedd978830eb96e5d54d4869/fibalisutoxotobizir.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c7f52cfb2---39471621052.pdf
    • https://dogathermalhotel.com/resimler/files/vefezemuv.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608223855f640---mimarevozoj.pdf
    • https://greenfuturevietnam.com/Upload/files/77551280323.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/h73due80kn2jij5rh748f31abe/tiredivewilibigu.pdf
    • https://nevisnews.com/userfiles/taxurofitofaxurakatum.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/19b88e993c107cf054e436fcb1a01bcb/94374087262.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=city+of+ash+1+chest+locations
    • 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_off0000ee06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 16792 bytes
font_01_sfnt_off00010618.bin
dddfd68f381e0189233008c3ad61655563fa9b5bc9db73c46131f38aab1b7485
pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 16916 bytes
font_02_sfnt_off00013168.bin
8eb999377609946e369e5a7828f66574d584fee88d16567d73b2fa736a1e2fc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 10532 bytes