Malicious PDF — malware analysis report

Static analysis result for SHA-256 046c9870ad3925a8…

MALICIOUS

PDF

62.3 KB Created: 2021-09-11 04:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4870c63e091653b37993f50b2ec0803a SHA-1: e6d90826298be5a6c1358538709e462fd396ab44 SHA-256: 046c9870ad3925a835544808c36e7edfbdb813625459438bf54ef7bfa1b4917a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and disposable hosting domains. These links likely serve to redirect users to malicious content or phishing sites, making the primary attack pattern a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5680

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 https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/5cec6a3bfa5dfd8c54fd01e9e30aa092/98845002136.pdf In PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16133a85299aa3---begivetiguxiwosevo.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/xowikivuva.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/54792841422.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/13943740019.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/nawokigajopiwopuk.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/joxugopaxo.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/zenarumapaketikotejigu.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/boxix.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309e14a3e6f---pitaxoluxibavupatiburu.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/76876046332.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/lekiderapawoxisavoxejuj.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/69082454160.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/divukotabusumefekakan.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/sivodabutodoso.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/31854785970.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16130689d806f0---12793247492.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/71952720935.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314959c98b6---vujifadi.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a526bd1956---zuwiforominenoxogil.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/75189847419.pdfIn PDF document text
    • http://sibstroiexp.ru/userfiles/file/62166695765.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-10/20210910132833423420.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/wukirukibimul.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8b14a5912---12655850017.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/zisonetiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pokemon+tcg+online+play+storePDF 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_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 10924 bytes
SHA-256: 3716b755abac9d115cd505948c2516015188f855a12887b3b2c584d0aca8da3b

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