Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f47c248f20c305b…

MALICIOUS

PDF

79.1 KB Created: 2021-08-08 15:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5852cd2dc443b01d11f0b1a8b8991321 SHA-1: 0a6c17dce068e387bff17cb89c774feafb8febe0 SHA-256: 2f47c248f20c305b256d2cd54fee511a76b680d9c9f1c89f95515b1015f54c00
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged it with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8943

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://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c02289d863eb2d12356aa69077fdeab7/26529660101.pdf In PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/61715692879.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/pewesafipif.pdfIn PDF document text
    • https://seikico.net/img-tym/files/bumonodipidowapekosezabud.pdfIn PDF document text
    • http://www.shadowrangers.live/img/files/86385940987.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/84841021811.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b166097ff8d---19746500781.pdfIn PDF document text
    • http://sbairs.com/datas/files/42247349266.pdfIn PDF document text
    • https://thepainter.asia/upload/files/26159324803.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f99801ce74e---turuzewirusus.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/88123574238.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/db8792448dc3c04fe2933561798f03bb/vedowigerivafogobik.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1509096c6---woxonumefopulenofeneg.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/sisoviwudoxatilopifivi.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/51688620768.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/13174793270.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/07/21/50220179862.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afceae0f947---75589440495.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210706073125_t6uho3.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609300dceb65c---79864172856.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/998d4571dce801e7abf2be594357bde7/36867860671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+change+my+keurig+2.0+water+filterPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 17212 bytes
SHA-256: e1216583c13f62514a753cc5ee497c7210c88091418a9615bd0a08ecdbd05c85
font_01_sfnt_off000122dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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