Malicious PDF — malware analysis report

Static analysis result for SHA-256 7228e3c0820ef2e4…

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 19:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 80024285c83304d02813fc769e0e8782 SHA-1: 7e3238b264a8fee5e674022577f1f65aa92ebb94 SHA-256: 7228e3c0820ef2e46b5238cf21e57c0b9232db3c980b626e22dc2ed1b75ace4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous links to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure suggests it's a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://cnpair.com/userfiles/file/pibomiwamokavid.pdf In PDF document text
    • http://bronia.org/userfiles/file/17746352943.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/tamekamusunetuv.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/39rd2rsohvbug095g07qlvdcgd/wirumurujejaseriwaxate.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e89d73a514---lepiw.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/roriwigunukemubisijev.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/nulinenegapimesefaniwerem.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/sifumawonidowipo.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160940ca6d54ba---gukixakuponimelox.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/tudovudenuwugavaf.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/52627331508.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/peomgs7lukmj165b8inl8qdonn/rigodakugalijedawuva.pdfIn PDF document text
    • https://salonrewards.ca/images/file/67378718631.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/mipexejiluwi.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850e50d72fb---nilubudafikoporox.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe0b2163b3---junavudifuxavikanigagaxul.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c113d191c4---bugomovibisomevev.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcadd47e6e---pexegisubedanedipepam.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/juzid.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/nejome.pdfIn PDF document text
    • https://sca-kc.com/scauserfiles/files/muwisusabuwumezaxiza.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/popanuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=18+mm+to+cmPDF 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_off0000c2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B7 18012 bytes
SHA-256: 345d7dab42ed7a675932f75b430cba09d5a3b53edf5a0f04aa19ba4e4f7a1eb1
font_01_sfnt_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 9752 bytes
SHA-256: fa9d442e49ca6879cb3f9003772904a849e8517b17d5395fc8129dcf9d3deacf
font_02_sfnt_off00010635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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