Malicious PDF — malware analysis report

Static analysis result for SHA-256 a526cd397d9747fd…

MALICIOUS

PDF

87.7 KB Created: 2021-05-02 10:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 222324ef29129108156ac464f4483dcc SHA-1: fd336df6fcc39643bae4be559bf59284bede9dd7 SHA-256: a526cd397d9747fd3912d902c6ce302dae521fed3f17adc66aa95c6f2a8527e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 WordPress sites and potentially disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'performance at dance school', likely a pretext for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9547

Heuristics 5

  • 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
  • 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.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4db9e68834f1d9289e526daf42076689/44279149703.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/901e2fc05cff0222455b3b28b7ad5eae/jewozina.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/bk9f58r3sq6sm20t4msqo2qr67/logikibobagi.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f996d113---87837110689.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c7f7f337f7181d76dd445e06aeae9a1b/25207397016.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/n1o8blg700fqj3ooo6mmscpflg/fodes.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb83964710---87060891250.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801c3f64500---talozaka.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0ac73ce7e---loletabunutogubu.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/4svs879f8ncol5e6865co69bq6/12850973945.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4754615f---16247553390.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087db5b6ddbb---tozefijuzadavuwetap.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30aceb3f1---bazopezusidikesulitalisad.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cc01e82dc17f2e7d255ffc2e5a6b8c73/bitetimepizalixebabuwikon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=performance+at+dance+school
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b92.bin
db365438f83e6b84ca7f1ae941bddf30e685c29dbbdcb275078c2ea2f630ab1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B92 5260 bytes

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