Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd35864af2ef294…

MALICIOUS

PDF

88.2 KB Created: 2021-08-14 14:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5fc44abf9460a328c0d605b6ecd0cccd SHA-1: 19d055cbf2cb25e7f697b217c9626711aa3d1e6e SHA-256: 6bd35864af2ef29422e3c432b8a29c04d3dbe84abc1ab2817b0a170b75cd4baf
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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
  • 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://basundharamart.com/userfiles/file/magebaroxasuxa.pdf In PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86cc386eb0---2725817186.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/dekowupokulomezesaviluk.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc66f1d3df---31674293572.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1fc6e1b76---lotanefokavukar.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/bejemesimasik.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/53204982971.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/zoledisote.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3b4fb837f08284e93556964d6d1965c1/tixopolopibenirajerifawol.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/fazovo.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/43048805616.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/205364da2dd9844a09c79a3a88c1b8b5/91237150737.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/1d8f2fda276ad7eeeeacf95c18b00b48/fudoveriruvowoko.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/10391055140.pdfIn PDF document text
    • https://www.aeap.com.br/ckfinder/userfiles/files/25647428350.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/69a2d98548cd456ad26bb7f4f1cf3d18/vojiraxefututesun.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/96547092621.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/zebuliworewiwefemoraje.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161085abbeed37---41591698642.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/pu5jlqvpbis8s4hrh971nckkdn/90298828914.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160967f97a4f1d---19177045664.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/8m3vtfaoqunhfq39j5i7tev2kg/37392307389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=housekeeping+checklist+excel+format+for+officePDF 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_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001089b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089B 11212 bytes
SHA-256: 5f4217f48d48eed853e0d672368d4fdf6c6b88862734dcfbc656de13ab8c0e4d
font_02_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 17780 bytes
SHA-256: 1972c5c2db3ad746357e057fe1e1ba5981bb1582defeb35e77118ce45f8bed1e

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