Malicious PDF — malware analysis report

Static analysis result for SHA-256 e167bfce8481987b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-04 08:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: edc90831bfa579e83dcb7a592a0dfdc1 SHA-1: 30f6d98d9e210e3964375ac4d478e61804aa6c69 SHA-256: e167bfce8481987b99c0653db34e86a85be02219f309b7b4de6cf95097577785
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 heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as a lure to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/nca7lqoc680edcagn8h4fsb2t5/wovepegubapigeguje.pdf In PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/625078200962f1e02ce10c954f14c7c9/18164030779.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160812da911d14---64251835978.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210626235341406251vy50m1x02bdi.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/05b381f083041ca8a00cfb0e9871f29e/75172434415.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/5902810343.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79959c57c---85491756310.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609105981c89b---90554829552.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/44019954510.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d9013625---14404071083.pdfIn PDF document text
    • http://burnettefamilyreunion2021.com/clients/867108/File/kevosepavopewejetonagewag.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/30147804224.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/pegenodepisowafunet.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/43794724570.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d91b91b6e8---73520980049.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/84571523778.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/19626344738.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/4q5tfqp6tk1k2l9b2p1d43i7u3/26310612449.pdfIn PDF document text
    • http://raczcsalad.hu/files/xujugoluba.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/bekul.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/kujufenufutaguwupanibube.pdfIn PDF document text
    • https://maria-galland.ru/files/file/werusomisesos.pdfIn PDF document text
    • https://manenshop.com/upload/files/fudebetixe.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/fisinunomanenobejak.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/bulabub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=juul+charging+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 16396 bytes
SHA-256: d820b2ffd21ace5df6ba885059918ddcdef8ea9d0167650f8b055a050cab80e7
font_02_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 10248 bytes
SHA-256: 06d0a50b074cfbf94a76592d5ad96e1121e61138166dabe999b93a53d4cbc3b8

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