Malicious PDF — malware analysis report

Static analysis result for SHA-256 9459104a267b78da…

MALICIOUS

PDF

80.0 KB Created: 2021-07-01 09:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7abedd85d66a3f17553645e7ce953f87 SHA-1: 5e6f4c0cf1e7e8aa300e53b85cdf46c3291d4fde SHA-256: 9459104a267b78da22c034ab44f2a0ba17e6aeb241e5e55b8c44c129e78c1766
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan. It contains a link farm with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it is not intended for direct user reading but rather to host links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4142

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://afghansolar.com/userfiles/file/wodexeluxinuwisewokasa.pdf In PDF document text
    • http://hopkins1983.com/clients/861771/File/dexekumavad.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7489dab961---dofuvosafata.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608092eee1dce---tojebo.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608790e484113---4658318368.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607f93355c11c---50803771028.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9500da64eb40c2801d0262d452d52e57/gebukiriguvuwozuwenej.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160743bb20e684---49117793090.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/68682ed82c8095dcee51be2d97cb32b3/11497335311.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c48f43882d---90625016532.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160acf75249226---79852697935.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0f68c6d99---58098151741.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082ac8f99910---66434335307.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc1c5c523---nirax.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c36089420d9edeb11df3f5e2132c97e6/4319913563.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/583cb55595b4759ac075c7b492937fcd/sedusuzifivilunopazuxarol.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/pogizobazelol.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c347a945340---51664622951.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd8cd0e91---binazewi.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/02d90121ccae10efa17014c9e1cf09aa/82802959662.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/29422940856.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/e22ba05adfa07b5fbcd3edab24fd983c/redavaxukazogerosifi.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/uiv9ppamvutmmrqvj0hsmtgcsr/63748440660.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/615843a066462d392047052061483ea5/kinikidewabivaputexe.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086244801fd9---51123817642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wolf+of+wall+street+full+movie+freePDF 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_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 10516 bytes
SHA-256: 856a508d1e5296bcf6a6c3b752f9ae0e15d7dc1dacd61cbe117123f4c602ce4c
font_01_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 20360 bytes
SHA-256: b0ff713e9ab316d8044dde15dffc63706a4bc82082a3ef2668d218bb79186c55

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