Malicious PDF — malware analysis report

Static analysis result for SHA-256 c801e909da952448…

MALICIOUS

PDF

84.8 KB Created: 2021-07-06 23:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 31613d25989ad21751302911a58e2d52 SHA-1: 1af2a65f1ee3bb1b13b66f1c8caee1c7b95959d4 SHA-256: c801e909da952448d6d9227db40f0a3d2575256830e0c101586e865cbc61e19f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting it's part of a link farm designed to distribute malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is intended to lure users to malicious sites or download further payloads, likely through JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608570de92d41---tedivezepetivabup.pdf In PDF document text
    • http://macautemple.com/userfiles/file/75850176351.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/43581843619.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/51323856560.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/45525274169.pdfIn PDF document text
    • https://everestart.com/images/stories/file/veboxanazuvabasufinazewek.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/abd63779d92475ec7b08cd5c6998dc27/zimexivipoguwavisor.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/242548675609a960cbea18.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08ff68d152---2332217826.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/jevamepetodusijusutu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b302d1e9d2a---pejijawejolanenesuguxir.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084508dcd02a---moxenojofer.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/c3fd50d922abc51a2c94dca2a8785d1f/xezinawisawosoporidutop.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073770491e4e---2601294208.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/tivasi.pdfIn PDF document text
    • https://fultoys.com/userfiles/63977386620.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3db0333ba022f54c6d6ccb2a43b5f72/37536614870.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/mulugovedenalemuvesis.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/jixodejurujeleg.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/9421035418.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/26581551162.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc1c3a2df---33478901219.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609a681135fb0---96906596901.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/bivijekaboduvibonet.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/titoseledeludukezi.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/8ff594a50d97523380736d1cc9827931/ligesije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=should+i+let+my+puppy+cry+in+the+cratePDF 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_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 16452 bytes
SHA-256: 1d954e2fda6edd84bbe91c21bbc8168b9583ce32bd8596cb15e56b66b0c23a93
font_01_sfnt_off0001147d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147D 10900 bytes
SHA-256: 8b8e5b551be006a9506a5e2114745fc108f2877f6b11d052366bf0afd451ea53
font_02_sfnt_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1