Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e50a903f9bd3d4…

MALICIOUS

PDF

78.1 KB Created: 2021-07-28 00:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: e2f7d1cd83075f9113767fdd3cd026ce SHA-1: 5ccd3003ab369087ec746f1376e3768502c94b29 SHA-256: b6e50a903f9bd3d4c56a363342214e7cc40114859004299c376d4c4780c74f75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5182

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://xn--80aikni6a0b.xn--p1ai/images/file/34486297532.pdf In PDF document text
    • http://flightshop.jp/images/blog//file/78700290725.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c39a75241---27053735602.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/30152811506.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b6c5973835aed13df01c00f7458f0f87/41088464026.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/o1kbpgsd4kd0b3d92rq6fbmk85/1963692603.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3h932ubabco0q4tuaok833cmb1/remanu.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d37944a749fa6ccb0bd1716f1849a2fb/magewufapozagutozekoroxe.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/0e86c060e53c24f5a3c236639a030917/daralefifewatokar.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/9bv6rcn51vrtuer90nr4a4m2i0/pexukupipawunozo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/cbe2bcddb9732e80822700c8875e74e9/sesadurabopiwupawun.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a0aaa731a0ed9975e5661758d0e4beda/rasajenapapi.pdfIn PDF document text
    • http://boxethai38.comupload/file/29674086856.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/vurejurebepiwogokipuna.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/vajumosa.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/gawor.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/mogovaxuza.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160709fd5bdd68---62531568255.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/25144adfe4327084a6035a9f6de00fee/wirizemejafozobimepomad.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/5a1ff5c0e931509d8a9dac52cac72a08/desiniguna.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/48e50af75c488d0f6c0af88c015f776d/ropagamudavonova.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/47400348311.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93d1aa099---kevetuwetexazive.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/4c71ac27839eeca7c9660841f7389005/7577876664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=where+can+i+adopt+a+free+catPDF 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_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 10496 bytes
SHA-256: 321dd23151295d7772dc1f301edca75bb93d60f2397fad177c71bc9ea219a99b
font_01_sfnt_off0001110d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1