Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03fd82d9763a08e…

MALICIOUS

PDF

74.0 KB Created: 2021-09-06 05:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8387ae48c2ae46b2d21537f781c681a SHA-1: 979a4625938117f5621f5a9a494cd22ff69545ff SHA-256: b03fd82d9763a08e606607256401086848489c55336f70d20fd48211d479dfc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, directing users to compromised WordPress upload storage, likely to download a secondary payload. The presence of external URIs and a download button lure further supports this phishing and malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cad7aa21a8a---wutivipawisofivakabego.pdf In PDF document text
    • http://adamlegal.com/userfiles/file/35070660306.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/79490176940.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/44436385786.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/vowixumeraforapamesatoz.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/74971825193.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/xuzoj.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/gejuja.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c8e4192e4---9344742018.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/6sh36p9r9ldik8p850f7qcotsk/1945438147.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/bufadeten.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/dejowujevipuposimiximex.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/74852906359.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/uh21kq820sk4o1v3lsb52ksgh7/xoxodepufuni.pdfIn PDF document text
    • http://fitviewer.info/files/file/gigakenuboletuzobolomona.pdfIn PDF document text
    • https://gameclub.by/uploads/files/siwalorazabawesedozipogi.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/disenexozenudaluvejaj.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/wiroj.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/63265373884.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/pojobipaz.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/bagubadepubum.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/gogopadobizomexuxi.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612396c6cb77a---temanedefa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=bangladesh+passport+form+pdf+downloadPDF 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_off0000ba2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2F 18252 bytes
SHA-256: dad845fd8bcc73792d4c56f307dfd1bc4faa2b0979229b4ff53051665b400a24
font_01_sfnt_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 10992 bytes
SHA-256: e62c1469478137b0cbb00115e864dd0768e520e0616efedecd1fda97a99bb0c0

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