Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ec361be5125200…

MALICIOUS

PDF

89.5 KB Created: 2021-07-24 10:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 721f8e95b87648956f084f9c38a94b21 SHA-1: 6d4301e9153ec1160589a597e054bd34f552f294 SHA-256: d0ec361be51252007475edd3ce0e28a94e3133c6e8b424bae02be0fe5fd91ffb
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detections.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 http://hebammenglueck.de/ckfinder/userfiles/files/nivoxigutuwofegarikoxugij.pdf In PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/13353112255.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/piwatakagotefolunirurejip.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085686f8c795---91878975926.pdfIn PDF document text
    • http://arablift.net/userfiles/file/busobedetu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceee41174b5---43648078890.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/zilakikuxuvobumifu.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/529bbcd93d12b024f6e4d82f8a996437/nodezep.pdfIn PDF document text
    • http://prosquash.by/data/38963666943.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8d105b874---56332733292.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/28tr568ujv8430sufj459elvk8/xajeviba.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/wobegubugunike.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/42611555738.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa58367ed7---duwivu.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/pisumilidaxonefeb.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f74811c4f---39631845353.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/25341688551.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210611130909_t7puse.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f71602f1fe---posobesabofiminititefiduw.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca08e7806e---lerudusutezujiji.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/zububusej.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9cd93f594---bubonubi.pdfIn PDF document text
    • http://ranagro.com/files/gofajavabuxajeroru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=double+digit+multiplication+worksheets+with+gridsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 17428 bytes
SHA-256: e9d13ad7dcf172354a3e5d226412181e7b5f17005d82ee0cf7caa2b882c19211
font_01_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
font_02_sfnt_off00012585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12585 11380 bytes
SHA-256: f3ba58e58c6901ed928c3ab841e2385c800e177da6dba44d30b7178c5538d6ff
font_03_sfnt_off00013fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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