Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe203f858891bec6…

MALICIOUS

PDF

82.1 KB Created: 2021-06-30 06:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 06427dedb62d805fc8557f9684d997f9 SHA-1: aa917d26f2820c5773b68695fbf9628a2febf897 SHA-256: fe203f858891bec6c9af6a3fa37d8f57d5ac843af0783e56d55b20b7d3dbbf0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://inwebjor.ru/uplcv?utm_term=cartoon+character+powerpoint+templates+free+download PDF link annotation
    • https://muguet.fr/sites/default/files/file/25931860431.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2745ed594500489ad3e9acd777a64355/26657154746.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0o9uvj5mdtmig907bs9cf3fah6/65521450569.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/87685416851.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0cf82f5d---tipawexilipoxawixisugu.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c98db5e38fd---68695052028.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/927492326.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e68f56f345---zirejuvibojumilak.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/3f7of6bhottedugk16cf6fhkdj/35985883044.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/6521621010.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160caad13a9b9f---tetujiripekagejinenuruw.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/3787393852.pdfIn PDF document text
    • https://arerp.kr/data/file///tefamodajoda.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/jr0f99tk4khk6alorjkgsl58l4/60713019709.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/49651990297.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/89d366c5b5b5762a8ee2a9fc4c9cc68c/wisopekibatute.pdfIn PDF document text
    • http://toonesk.com/upload/58737089854.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aca5b9f755---mefeluwo.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/kemezukijowoditiga.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/ca9f87c7b230bcd03183d7e71b40bc70/dafovajogu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd7afd6690---40013608644.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb99a5308b---87680910652.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd57e40bba---fowamefoxotedatejenaji.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/25106385288.pdfIn PDF document text
    • 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_off0000dd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD29 11000 bytes
SHA-256: 094aaaa94b6056ed25f97e0b432129f79c8d5f72c4f73e65a5d13f568f732df3
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 17292 bytes
SHA-256: fda4187955afd188f39526dbef23c991445f4bdea0daf7e8680eab84a4138a24

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