Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bb460d848b28a0…

MALICIOUS

PDF

86.4 KB Created: 2021-07-01 13:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4708dea8da9ec6326ea3dc01d9e3572d SHA-1: 60f8eca0fa59d83a1c6875de2826f2236b4f4f9f SHA-256: 45bb460d848b28a0e583eaab84847f738f973a1d8a6c9f559e694be9c7a86adb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to malicious sites. The presence of compromised CMS upload links further indicates a malicious intent to host and distribute further payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=rational+recovery+jack+trimpey+pdf PDF link annotation
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1d5a4396659fa4bcc3d11d0da0ce6bae/31097554762.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f8af2d05---70229524134.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6ed17767c---rusirisojekanuna.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160846fbda73c4---xofarebadozipamuwegexu.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/59070996420.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7419b5d3e---75487147364.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0226970303---18612166957.pdfIn PDF document text
    • http://qca.ch/userfiles/file/86114577325.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/500ca77005febb35ec702a103fac0630/fenisubit.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/cc73bf44fc9143883917c883b8a18aa9/mekogukomo.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd47d2cd20---kiwibe.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/zeforedifeli.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/d04f0fed2fe841298e2935c7341bf7ce/35818120051.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/gelepinesuvijibibupamoko.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/42566323861.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/mcgqlvj1stqi3sthgif7l9h4b9/nonimubaroxogizataxodike.pdfIn PDF document text
    • https://area5srl.it/file/sivodebodizedubidulexap.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160987bf8b93e4---214324980.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/jazoxifegopisaletoxered.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16092d46610786---20515925885.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/0ba4011a8f252e394585c1d565f67c7a/13715775939.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/67664113889.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d817ec31de---dijuxekiw.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3db43606e---49034032673.pdfIn PDF document text
    • 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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 11060 bytes
SHA-256: 33a6e568d3b6aa7c252a3c392b6a222a2fb8f796448f49b8a609fc4db428a49a
font_01_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 17604 bytes
SHA-256: 753cf6ed2b0323897c7a1767a98333d955d4d545f80f12a0f0746fc90e8d18c0
font_02_sfnt_off0001340a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.