Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e984106f8538451…

MALICIOUS

PDF

78.1 KB Created: 2021-09-08 07:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4b5e1a2a5c60e96f2b2234930dd5279a SHA-1: bdb8e345c90c79a1d24e9d170e413f81cb69fd5e SHA-256: 4e984106f85384510fad9f7d91ca83d38ad5b3edad1197f9bbd5d441396f2a16
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to external sites, many of which are hosted on compromised or disposable domains. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7129

Heuristics 5

  • 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
  • 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://cyclad.org/UserFiles/file/vunijujopamametejomof.pdf In PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/voben.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/17811900431.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/32921377239.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/0947ea743add1fcf742640f0e518c2a3/94028293850.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/22387593116.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/tadokezosodisisob.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/nh3ld4emtk3ohkos3nl6qujk83/wipimiputi.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/96030018559.pdfIn PDF document text
    • http://noelex22.org/userfiles/file/17889636692.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/8855b414fb28057c357a0810ed6e1d8c/silesixomigenur.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/41886591217.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071acec3e6e4---lijojata.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/jopawusolid.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/36900224917.pdfIn PDF document text
    • http://rayer.cn/d/files/kogotomazemivogotul.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610dcf90b9e4a---faxivolut.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/evm18r874hlbmh5892oqj06jr4/54955428393.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/c6b963d6c9f0f1f16ca2506f97e7588b/wugupaxazibuwixorugewumal.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608038ef9ab97---basezunulov.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3f129b0d7---38205626813.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/86492bd8f3666569fc4d7d98eb031561/58649556370.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5724e726dc---6933403097.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/71683781761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=information+technology+terminology+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DF 10964 bytes
SHA-256: 4b0b7a92c7cc9f2744772a3e41ea0c4fc9fd410eba67ccdd25f6548652f7c666

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