Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fb4edb84b58cdf…

MALICIOUS

PDF

77.2 KB Created: 2021-08-26 20:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f6c82429e9e87e45d0ed365adbfd9de8 SHA-1: 2134560258f69508a9e5f2c24b59ecd922fc1af4 SHA-256: 47fb4edb84b58cdfb8aa8c86582d4cf4f9e65b1c4e250700667e9ebcec008af5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cartolmania.it/file/wevimixixefafoku.pdf In PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54260d5ad---kedofugivan.pdfIn PDF document text
    • http://atrsara.ir/resource/files/67065960410.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ed9070067---fozazaborunagavekaxow.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/a718a98367dc85932767672bd5f8f4ff/dazem.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/93838107631.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/77287937103.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/zijujutirapuse.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f4d6f193a---fivivaxilewekonasur.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607df1086e176---57959208208.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cc2ad4a1b57a14d0ae80f77e4cffefd/86130823051.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adb388bd970---22266309354.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/19fa7ce107bf3327607cc14405da5001/52142631880.pdfIn PDF document text
    • http://reneenicoleevents.com/clients/865995/File/lodarewiwefajewolazili.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/5844906972.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/708854755.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/8945011872.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/bojowoxe.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/942opu17d2akj93tvn775l52u2/pujuxubutefupovafuzote.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/14011541270.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/rimodezedurawibadefo.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/jimejap.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/pojakipefusovaguzesigozup.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/a3265165467a9ae4e0b565e29bff9533/fokajojasuwubavobiwasis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=amazon+prime+latest+apk+for+android+tvPDF 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_off0000d0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 14524 bytes
SHA-256: 1440bfc1cf61bbfa99ac58007a090c816709555376f88d721186e1c9ef7f74e2
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 10856 bytes
SHA-256: 8612d39aa2694457879f23d6de3ec8d5a4e95d84d02d8873160ffecb17f90891
font_02_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1