Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5628d0333b8c12…

MALICIOUS

PDF

65.3 KB Created: 2021-07-24 04:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 8d44acfbf3bef5a421f215b8ce15e2b6 SHA-1: 838de278a7bef6d8002541ae365f96eb68770640 SHA-256: 1f5628d0333b8c1281090bb622ce4a2143cfeb1236cd436028481a379addb960
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 0.8375

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://carparts-fixture.com/file/file/85873103372.pdf In PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bac88a32a---gurikojilarajesupavobet.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/tijinolanuwobini.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/24675881697.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3585e32697---56942470365.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712a797287f---nekedatazukiwinavuvawujo.pdfIn PDF document text
    • http://kisito.com/userfiles/file/40198711251.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/slkq9smrlu8vvrdc0323mkipm6/35713737168.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cd69266447a---mefipuzetolususididaxezo.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/medotenimu.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/wejupajipojelogax.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/f792ca21208a7856d24be50b2bdc6c4b/73713314840.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/6914769404.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/zofumawovoxesezupu.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/92041996257.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/41783241975.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070874ebba5d---77494213665.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609236e5b1327---78464835298.pdfIn PDF document text
    • http://synowka.pl/galeria/file/nifisekazuje.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c209ee87b1b---wakamixubujanonu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/gafijudoredewojakoxi.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/61320989091.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/ca084dcadf6f6522f72cc3490d5554a5/vepinije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=achyutam+keshavam+rama+narayanam+bhajan+mp3+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 11568 bytes
SHA-256: 20630e48e29f31ff436c0c9b23149d0b1293d71d5e1e3edd31793f3dde590ca8
font_01_sfnt_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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