Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0978d0ee8a14c7b…

MALICIOUS

PDF

79.5 KB Created: 2021-06-21 10:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8ce806ce0919b50b986d28c8417366ab SHA-1: 627a9c6dae8dc34c3ec72cb985997ad6a496bc41 SHA-256: d0978d0ee8a14c7b03e3fc7130427e20eb35654f70bea4ab4fc14e90cb8c74ca
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of 'utm_term' parameters in some URLs further supports the idea that these links are intended to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16085fa3cecd93---10914927882.pdf In PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c535e8a44e3---11749346736.pdfIn PDF document text
    • https://master-service.ro/images/file/daxagemuferi.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/kukodurimibera.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa10b09c98---95473219880.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/jawamimuxelajivazifo.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/sivaripiwix.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/74473200938.pdfIn PDF document text
    • http://nakatka.com/files/file/80881607387.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/e434139e19dd0c85e9cc0b95099ce566/54275018201.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6f89237aa9f05c239c45719ba4ac0106/35708806292.pdfIn PDF document text
    • http://aimic.com/userfiles/file/72431706250.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b44940be61---23974418013.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc8c5813b1---96777063599.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/56115481384.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/f4ccc9a673886c26a7d7cad06da8e12d/lujanozelol.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2507ff3d345e7f153a45d954b5a9b8c6/8423862690.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b48a63cad04---33866925740.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/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=carnal+knowledge+and+imperial+power+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 5244 bytes
SHA-256: a5613dc062fef362351df6a03aa3b6f975352e23deb70801dc07fb896a384a87
font_01_sfnt_off00010aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA7 11548 bytes
SHA-256: 760f21aca88b41721b61abd73844b8bb4f0ccf0231e30eefb5cbfcac81146bc2