Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe71070683cab4c0…

MALICIOUS

PDF

64.0 KB Created: 2021-05-26 16:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 59b4ba811622c3f4f0b924a729ae7e72 SHA-1: 71609f8f550cbf4cca3273e0f6a7d75fb57a986c SHA-256: fe71070683cab4c09e4f8e160055b51d1abb7740406c51c402ce7426663136ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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 http://altinay-law.com/images/file/logaxoparawojewavipedurer.pdf In PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/e3h1mtff8eakmogeeq376av520/33370086351.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8590417464.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9ab6fdfb1a969842590c7ad2aa7c313e/pefamasugimuwexesa.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab02456792e---nererolileberuxalifumun.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/28417910665.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/8gc0abt786b6g2ce6ps91203n0/37914175198.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aac4b7f3a2a---88443124791.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/7439f65ee016f3c34f98be20de425284/wakogasukekokinimolasu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/196e7df60cb6ac54f53dfe102e50983d/nugekafegupara.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/2c0fbf1137d62dad459c849b6f696de4/35458684057.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/4053a798c7bd8df8cabfc070f895fba4/zixelabitirijuwufif.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f699fa9dbe---31659080511.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/825ddcb2c08bf1dd1ff986903092e3c5/7294139702.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/2ca88c12972b8a4322fd3a6cc9ac7370/gukufemefemokoxijeburi.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/17007059909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=clash+of+clans+dns+server+iosPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5076 bytes
SHA-256: 2dbc786eb69e1259b41394e446a44544b9f3b1061a6905a329eb87fb7853e883

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