Malicious PDF — malware analysis report

Static analysis result for SHA-256 689545edd1d1f536…

MALICIOUS

PDF

85.9 KB Created: 2021-07-13 21:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e2502faa1d95c350d97801dc73fda239 SHA-1: 4c3943c88ce2961a8b98f2023d7c3dc68f4b7944 SHA-256: 689545edd1d1f53681c46adf8862f1c6c59975e815db61a2215afcb4f76d3bfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 https://haps.company/wp-content/plugins/super-forms/uploads/php/files/pee26n3qm0v6upknctruav58b2/wegosiparivanin.pdf In PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606efecf3e31c---27217081764.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/64771104887.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/21d0c46da0ec8d84f3b1fc3bcb62ca13/vinawamugivosovugexevux.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23b11cc53---92394957991.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/28120781978.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021070202431937.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/3844671094.pdfIn PDF document text
    • https://lemanssrl.it/file/63055123582.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/ca00141ffb80c8f90cd063862c93a892/duvasiximafimuxabobiwaxo.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/80906571406.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/4870af52eb3ccdda4e08a1328e0e3964/fisen.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/jufejosexiboxonixi.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/rorapedaneb.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/gejidirajazawogej.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4f941439---wafolexuseve.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160838104a65d8---kuzekoponotefi.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/xegix.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/jamafular.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210625092648.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/72965546302.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/rejetumidowuta.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/jm8ie94huv3ek1vdt6edu7q9f6/2642623230.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/27162799255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=media+access+control+is+the+sublayer+ofPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 17160 bytes
SHA-256: 35f8796cffa1d55edc8b51ffe9e98bc698a32bbbaf19436823e56f0fe9a5712e
font_01_sfnt_off000118bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BD 10920 bytes
SHA-256: 193ea52036ffef91c995160664b35f95dc34d312fa0f272f4af3642ef25298a5
font_02_sfnt_off000131f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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