Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec861aa047a44f5…

MALICIOUS

PDF

80.2 KB Created: 2021-08-30 12:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3d82f123ed115064c1a62a63b3bcdb99 SHA-1: a477392298d170fa6786572e291d5a45073e7634 SHA-256: 9ec861aa047a44f5fbd020e94cac86c38b140d7789d9369c14b42f13fb167c4e
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to various PDF files hosted on compromised WordPress sites and other domains, indicative of an advance-fee scam. The document's structure and embedded links suggest it is designed to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2qctnhhkfkplh74pr057l2nr67/60782775147.pdf In PDF document text
    • http://daehwa.info/uploaded/file/67257321167.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/xinuvujiwusulitut.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///82142461242.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/70060357649.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/75274822454.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ua0k9gp0d8p95gd1vna0ts8o90/57706010103.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/75965022611.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/e60f18316117f35af1618d68afd18c48/15993491825.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/wuvodubovo.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/leluxejukilol.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/32058552643.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/29465931968.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612028d62975d---58400467909.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ljcdd30gevftfr3lr7nom6nup3/ziwonuxareweloxoweda.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/5568484204.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/1d5c703f3dc0abccbb9a9071a7cbcb72/80320898000.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e2c08c72352---jejololezowefifov.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/guvomumirenifopesaw.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/6ffc0ae876e0e897bb63ad6dc1bfd8e3/kurolub.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/35450434166.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/0jm7canqh9pup9giiiejmrndf1/58501391402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tricare+reserve+select+deductiblePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 17152 bytes
SHA-256: 5fbc1e8d5c0df81602f2265ac453f2c1c5ccbcfbcd60a780cee68ce72c90e503
font_01_sfnt_off000103b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 10408 bytes
SHA-256: 4a7cba215d760f808e696332929a239e14cccc2cdf0a351f387c1419e97c686d

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