Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4aad5396316725…

MALICIOUS

PDF

70.2 KB Created: 2021-09-08 00:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 31b89233b64057dc14064e278e359e78 SHA-1: ba35725222de13a607d5dc40693f4c0d0963fe38 SHA-256: 6e4aad53963167259a497425b07b7db44345398d7a0badabbdaf5c191ca15b1b
154 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially disposable hosting further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6933

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://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160814a7617cab---79823727377.pdf In PDF document text
    • http://simonide.org/userfiles/file/18185244271.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608e529564343---gekabapobibakozeromovi.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/07/files/210730013352.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/64268530395.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/853180314.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/85622622573.pdfIn PDF document text
    • http://tfforming.ru/d/files/41751277922.pdfIn PDF document text
    • http://thebaileyfamilyreunion.com/clients/6/6f/6f45d7e5c9279c15d0bd3a3fa6949618/File/6507348033.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f747ae2cb4---fataredorube.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/19169299325.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/gudusimifof.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/54541603471.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c72e272920---mojagenaxemupodalifafugun.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/divamuvozuremetu.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/4d40e48b2bdc9784e5720de3bd00e251/4414274080.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161145a3ae4c25---36253256078.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/98037951953.pdfIn PDF document text
    • https://cape-electronics.com/media/file/32295073716.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a342cbd9efd---94946281505.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161219707c3e86---26479571483.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/91033552114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=spirit+animals+book+1+wild+born+pdf+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_off0000d055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD055 18400 bytes
SHA-256: 31ce268bc01d26036756aa80074c96db34853ef2b0017a10cc363647583321a8
font_01_sfnt_off00010016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10016 10972 bytes
SHA-256: 3088e466343f0adda1e480bb600707d70075dead58df94de0f5e62747c05d518

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