Malicious PDF — malware analysis report

Static analysis result for SHA-256 572ffe8965d10815…

MALICIOUS

PDF

69.8 KB Created: 2021-07-14 03:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 62431adb3f51b3297049857247ec0782 SHA-1: 85382cba552d1dbc3a7ec85c3c7de307353c946b SHA-256: 572ffe8965d10815b9cab1991154d72ce72b7bd7e122e381010eb151039939c7
154 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 ML classifiers, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting it's used to redirect users to malicious content. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

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 http://hzbmsj.net/images/upload/File/96046020796.pdf In PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/78mmpo147toh4fq25brd98hiqa/7346118903.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609287ad5499a---88351166526.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/jenadaxa.pdfIn PDF document text
    • http://roocenter.ru/upload/file/vasagene.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210615_7FCBB0E0F8AE45EF.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f12046b31e7338e312c0dbc31c99c98/bumosakotivakukob.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ifcm48tettovp5db4hfrt9n3d9/91502519094.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/32692320884.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/dutawaganir.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/34831742987.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/02e6feb386e62d5fb9c7dfb13177503c/8043944363.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/jisisimenukabedarakas.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606e244fa289c---42191653474.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/95816932605.pdfIn PDF document text
    • http://jkohut.pl/file/83093696001.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/diwakinupuf.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/rorujipiwu.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/a0dcvsktpm2vp47nfelgrkmju7/wonoki.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073bee4d11ad---netidival.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/gurajogegasuna.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/51263828f69aac76bcabf3cf58f6f67d/xifimuwa.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c1b5c2fa---xuvetuli.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02e7bb31ff---fanexokumemosizojigevi.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e055f6dcc7---89793736142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=types+of+constipation+in+adultsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1