Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8455410e65a138…

MALICIOUS

PDF

73.4 KB Created: 2021-08-10 17:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 43b6bc73d8bb7cd11406327e5b122178 SHA-1: 93082423f713f9e3c812a82bb07a59210584f1d2 SHA-256: df8455410e65a1388c91a043d66aefcc2ce62060e33f4371678dbd36ff995598
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URIs, many of which point to compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The document's structure and the nature of the linked URLs indicate it is likely used to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ge7flrnfh6gedgc4he64fsm5ma/rubemofeba.pdf In PDF document text
    • http://fioredda.com/userfiles/files/62761803921.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/miaoltmp0ug7hdop1hde327204/juxubaregogolikimoka.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeb3d72bea---luporepotozilifudiva.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f341555ecd3---wadarisukutalate.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/93591761585.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/adb296ebf87d479171470178d1d9d012/21744771605.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/rurugovipebebipowosikexa.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/96367291432.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/21a797d5991345640115cbb983e08909/46630739930.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/35304721279.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/bipuvujiluduleli.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/62934402525.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/40733102233.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/mevuk.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f684041b02---75086505720.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/xabaxidosap.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0232c1f902---4602129877.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/35266216221.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/8493966599.pdfIn PDF document text
    • http://beiks.info/public/file/jebik.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9f3324f48---bezujadoxa.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ba1a1c6bc---81863926514.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/0c0b193fd06a0b9b6e1ac80362916a0a/papad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=peliculas+completas+en+espa%C3%B1ol+latino+danza+con+lobosPDF 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_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 11080 bytes
SHA-256: f1c5bb3c5a85bba78e0fb757091eb51371f14dee5d6c48efea26ee37b8718026
font_01_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 17808 bytes
SHA-256: 62db4afa1c6f2ef9f4cf74361ccf7fb3f7634d02fe90005fcd9f7e53aa1ee999