Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4c2ac59d8acf7c…

MALICIOUS

PDF

76.8 KB Created: 2021-08-29 21:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: edf17c0475a9197e801157b5d207215c SHA-1: f3bd14b2b94b2061429cdb75744fb6d96e730d6c SHA-256: 2c4c2ac59d8acf7cd9175c5240566b945555460de7b94ee5c93e69b2a81fd94a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The file contains numerous embedded links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of multiple PDF_URI heuristics and the overall structure strongly indicate an attempt to host phishing lures or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/39534a98369f6552a3187949caa6530c/80975009733.pdf In PDF document text
    • http://ebd.su/UFD/7623/files/nojenikakeledaravevi.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f99ce083544---jevowefipo.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/48571351755.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/86461708841.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/44062867227.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/lakoliw.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/17709617197.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/a937m3em8f6koruimrt3nmaqk5/74718350458.pdfIn PDF document text
    • https://itscebu.com/upload/file/20210820232006.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/v42k6fisgsmbkdkuoo286p33ma/55213031168.pdfIn PDF document text
    • https://tavio.ru/files/file/rutaziradam.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/logigo.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf5987973---4266965890.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/bexiwebusevusenuzozigega.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/50380716797.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/62unrve6fapov0vthr42ue3arj/95777271392.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/6242451987.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/fc1f67f764c425733285ea5076083ca1/tidabemanitoxobiwubo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84784a91e5---99588705005.pdfPDF link annotation
    • http://scamps.biz/userfiles/file/xodaxipewutakabo.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/ronegozax.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/wevirusiwu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160821b7428b33---sisazelubazimaxev.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/54753766415.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=milford+dry+cleanersPDF 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_off0000c895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 10476 bytes
SHA-256: e4d1c6930196dfaecf92f15e198bced286fe292137fe2a6dea75d3344036c5dc
font_02_sfnt_off0000f88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88C 16892 bytes
SHA-256: e8438cf297b6bbe59f749b5178f9efbc5aab28f6bbcb293d62d0b5f4d3d7a454