Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f594d8f1b42f3a…

MALICIOUS

PDF

87.0 KB Created: 2021-07-03 01:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 46decdb50d71b6780126b8d1a30181cc SHA-1: 448e6a10396554f6989101475813f855e8967773 SHA-256: 00f594d8f1b42f3a12edfc138ae1043645ff0d7daae201b829489cbb01179d1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious by ClamAV and an ML classifier. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a redirection mechanism to deliver malicious content or phishing pages to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8359

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://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faf2d75f0b---zixanaguf.pdf In PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9dc1b1fd---vatudugip.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c1a216e3---82511364509.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bc935f873---wuvonesatobozubuveliwerad.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/regobewejekoj.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/6628ca5e1d2431389e7cfc72f644873e/84277601294.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/36298259401.pdfIn PDF document text
    • https://amblamy.ee/upload/file/44210726136.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/raxukopulik.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/lph68l5fs7gmsflam63qpbkl8p/20826003271.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609654fcd686b---nasijilu.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716d7d5557d---29097053778.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/tkrmuqnhkmuje45g3svlqa5cb6/mubezezaseterug.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160789ed78261b---77156040478.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/mivuvipak.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vata7v2uen7793ss0r4502lll2/wupixixatapala.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/17022665885.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/34711491089.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/80b1d4510eae27eb4d6ca88fb5d889f9/gejitodosuwemara.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607158f08cbac---pubogopopubiwep.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1bcf277fb9bc329abdd2ad5f96ce398a/sujawamutidavu.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4aa310421c---potixumajizatadipodeg.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/39831101002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=hungry+is+a+verbPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
font_02_sfnt_off00011677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11677 19484 bytes
SHA-256: 834df93fa6d3be1d150e7a0d76eb214ec95ab91feb45527256ed14352e9dfc32
font_03_sfnt_off00014862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14862 10432 bytes
SHA-256: c138eed20f79c36fab111baad42ece74b6742d9a0942fc590feefcd0a54d3cc1

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