Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04db7ab0465fdbe…

MALICIOUS

PDF

98.2 KB Created: 2021-07-13 23:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 32f22e994c10beb14401e4e27cd2c529 SHA-1: 9a5cabc663ff25c117ee3f9196bfd0f45c4982c1 SHA-256: d04db7ab0465fdbe527151e10dea4f0ce1c16f36c1ba8c9d53829285f986e6e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160756011a05fe---barijanetakujanuvon.pdf In PDF document text
    • http://mesamiesdallas.org/clients/e/ee/ee8f1390623de39be1ac2b47a321719d/File/89619968394.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/fe9796cdfb6b4c90ed17abc076935c39/18478333094.pdfIn PDF document text
    • https://kawanmto.net/contents//files/rekozu.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/24341717690.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/patnuf8n7bfucdqaou4rtr54rj/11625077995.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/12752863720.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/regekumaru.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860fe40be1e---1492673797.pdfIn PDF document text
    • http://abc-tel.ru/data/File/binawuvod.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/rerilogiwefixuwafu.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/62529988324.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890ffaa3a5b---popenazadijusojaxurak.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/4bup5hv7keknh2btv7clsas90e/51965512325.pdfIn PDF document text
    • https://luminex.pl/upload/file/85481501326.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/04q4bgscslsa911u5m5hhn6ts8/godupalojolis.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a3744e112b3fc033fe595cec94770bd5/78784050589.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/besesopotided.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/43535572717.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/rakoxudesaxomalilufe.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/52320802988.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/54488250608.pdfIn PDF document text
    • https://j26clean.com/upload/files/53772237653.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2da0bd4413---sitajukaturudomi.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a22cdea4c34---16803671687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=what+level+is+best+for+strip+miningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001096d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001217f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217F 17356 bytes
SHA-256: 3fabf698e732e8cee9d71ef5f7d80b345f594dff41bf1e8768fb2839059c5c8d
font_02_sfnt_off00014eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB6 11004 bytes
SHA-256: 989e7891f39dfd00ed80605374dae8de23a5aecc785db5f72415b2916a90080c
font_03_sfnt_off000167e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E3 5456 bytes
SHA-256: 90c6255722efa83e17cf6615ef52ab3ad5047c58955174eabb9c1832599b8566

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