Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3be63b4ab652e69…

MALICIOUS

PDF

84.7 KB Created: 2021-07-17 19:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0f7cbbbcdbf9ae3e10ae13c4d165752d SHA-1: f8baa4fbe38bfa93dbb5ce7a7b2ec7a47b0569ea SHA-256: c3be63b4ab652e69921920f2d489a7405104204b50f52f47f9b9b5b56487702e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to direct traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hoalavender.net/upload/files/22016656306.pdf In PDF document text
    • https://istanajpdua.com/contents//files/renejufizikapovazasev.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/68679263701.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a7c752b5---rexixemulopefi.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/vezijuwojomaderopidi.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/780e93f8d27ed3f803b5015790dab3e5/5533546423.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/8323889e60c14ea70afb090d52e3bce3/zokavasewanejerozujerame.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/94a9d1844c30e0e93ce2673571301c90/vojivew.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8d1aebdea19e574d84138b2da94fa3b5/44024072714.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/jadalejegoni.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/8d1558c2ce2137c9b21bbdf1e0ddf806/54799079452.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/d03gopc1ibql70rvum9ns35jup/96624637554.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/xobuludesifijef.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/79911552801.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fba3b00a5---16113083425.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/mopububogokubulitewod.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/91523112022.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/sudikumeruwuv.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/53ab3fa20317605d08f9509118c191ac/54485488517.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/bolitoj.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/jajewukezada.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16075359962c90---56950895329.pdfIn PDF document text
    • http://farmina.ru/uploads/files/56244657872.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/akn2b1picg73gh3nqq647b27e0/diguwur.pdfIn PDF document text
    • https://norservis.com/files/files/zamemuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=systemic+blood+circulation+diagramPDF 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_off0000ea66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA66 15984 bytes
SHA-256: 7060881faa8d2a6cc81cb373e5b9efee4c87399ce61dd97a2a643c31a9450ed0
font_01_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 11140 bytes
SHA-256: f7436fa539f8131ae4b3268556ba0f67823916e2fdb72b71f15b1f0fddc44035
font_02_sfnt_off00012d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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