Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa25069fa42f6572…

MALICIOUS

PDF

83.3 KB Created: 2021-06-26 14:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d0d7fe82a753391d921d92435ff0fb00 SHA-1: 101b146baf8411d737701977e4692d39afdf3bfa SHA-256: fa25069fa42f657239b647c81a78395801e35333dc641f2f2072682f44e099ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting it functions as a link farm for phishing or malware distribution. The document's structure and embedded links align with techniques used to deliver malicious payloads or redirect users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/0ghc22cjvsdl86ijruo86kl7u4/mubamurava.pdf In PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/99006800802.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/6ra09d79uo83fs5herfi0e6c61/82493681579.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/tiwumeb.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/65056705536.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6fnj06oi70vspnnv9i0t5mhi12/89981555716.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/94725595152.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874812f214---15731804006.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c1423b62428---26623813892.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/xulusaxitibazuru.pdfIn PDF document text
    • https://sambelteri.com/contents//files/nolujigenuwab.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b2c6aeae34e56fb5607bd465892c01c1/vefebowupekasosuzape.pdfIn PDF document text
    • http://santeh.md/img/files/wulepotojevofasufeniz.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160774a73e5317---labozufejate.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/gaxulijafumafixame.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19b7a6eae---wasozanepitivakosizut.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/45178959724.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b91e768577---wijuvamujum.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/vf43q569762v3p6vdn27rf8na4/ripanujigaxu.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/43782795286.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a06ac88fde5---binovebopozoziwuz.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/kiduzaburob.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608572dcd7e29---rolukalarol.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/188617d5de454aa11efa1398a0c012f7/73899937622.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b380fa8f869---38804033565.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=a+and+ePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 17444 bytes
SHA-256: fe87cbf83c690851d0d2df5750aa212d1095601725d29adce1cba250a6ad3f99
font_01_sfnt_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B76 9596 bytes
SHA-256: f98cd8619584068ec71db7902c9f85b2d4a091a229073ff4dc4d82fda69c866c