Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b25d6cfa91bb6e6…

MALICIOUS

PDF

73.0 KB Created: 2021-09-06 01:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: cdaab52dc0a3714a41cdc0cf8d18bd09 SHA-1: 5654307825ed54beae2727a685442073ff666977 SHA-256: 2b25d6cfa91bb6e6ac5d851b885c257b866f7265643259c52e8cc97e9723730d
154 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, indicating a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and does not provide clear instructions, but the overall structure and URL analysis strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7062

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://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcedce78c34---tosofotekudibukebapebetub.pdf In PDF document text
    • https://oklogistic.lv/upload/file/pimalurifuwizipuse.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/446797510.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160930604d31cc---juwajos.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/timemawepipomabe.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a09481697b5---davolatavibavamo.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/goxanexosepare.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608df7b9b206d---rudisugidexat.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202171451691880.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/xujexefifokarizoke.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/ddaed1a528b076d92f47adc50cddf0ee/92056689175.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/5d53g43p9jm4kln5tnq95sm1iq/89394881546.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a700e2d26d---nozikewuwot.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef58c658a7---lakaxorebu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4943201f14---94517304237.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/rexojeririsikevobaf.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/jumabari.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/fvi0csgtap7553f7d1rucu5h32/xakeloripezevunamodevaxej.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/11559917107.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/24421021007.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/jakuwesamakup.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/23620166116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+is+surface+irrigation+pdfPDF 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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 17276 bytes
SHA-256: 19a840dd18416e96b230105e3badc4716faf22f6095030d4db97f862ef269207
font_01_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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