Malicious PDF — malware analysis report

Static analysis result for SHA-256 171d2afce2f4a815…

MALICIOUS

PDF

60.7 KB Created: 2021-06-08 20:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a8c875e5da0c75a20c39e4780aa2ad SHA-1: f2f04301c56da67a40a725b789d28a152b5b876a SHA-256: 171d2afce2f4a815ed0cd67d829936456277c90abe05cb16f107624713882e86
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=how+to+find+perimeter+of+semicircle+and+rectangle
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/084e27d739cf00a1ca45f1b6fc6ed838/69846469480.pdf
    • http://akcjonariusz.com/UserFiles/file/bobimupipatig.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d004591880---11085714927.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949b92ec25d---32781162986.pdf
    • https://loctra.net/userfiles/file/kovelubo.pdf
    • http://www.allatpatikapecs.hu/images/file/linojariwel.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098af96eeab7---rarinavinuwakivomo.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/spdur5i1ts3v72jvroogfe4897/nokimanugusexi.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3608aed2bb36ae1b47a7e21d24f1aa94/495714715.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607146e365034---lolutikug.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/bdf2a80313acee25a1f05da917028dbd/danilizabanirudumufevej.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16083df467e092---76665118429.pdf
    • https://stef-nancy.fr/upload/document/lovopufaposejabopuloganol.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/f76vhgtu3ptok3d8p6b27rvho7/42932240849.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/35970498306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d812.bin
a1cef18b9b3a56844585f7ee3bcecd502cb1446c44040829b3f611652254b392		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 5528 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.