Malicious PDF — malware analysis report

Static analysis result for SHA-256 9486f2df0260d03b…

MALICIOUS

PDF

89.3 KB Created: 2021-09-05 21:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b9f624e6ae734db78e4777ccc7ef345 SHA-1: 9f213d84848ad4d4faa4ff0f8bf1eb0dd148bd14 SHA-256: 9486f2df0260d03b47488e2d38bf0ed0e4817f5d10f66adc8287ba3fdfa0525f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URI firings and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=neoplasia+pulmonar+pdf PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ce06534b077---74382366457.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d0c7f420a---19049749539.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0657b37bb7950e992e054cbe36d95806/zenarozo.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/zudijesadokuruji.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/tepapeda.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/33923212042.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/ralelopadub.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/bovubebotala.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/zuzijepezupulapebita.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb66021ffa---90044461742.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/ro2o9m5e8uqfhhvqgco71n3afg/risisakus.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/jatujurekugemokat.pdfIn PDF document text
    • https://servicepapik.ro/files/jinexip.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd807f6b2---filosaruvabajatuzogu.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/80443554488.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/56b1afba61d687469fa607f7600c3795/tebevagej.pdfIn PDF document text
    • http://contua.org/userfiles/file/jokokipunezexobajigewe.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/bolazov.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/gefizexazirebabe.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/96163943276.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/kemukuvukopitibepaxixipe.pdfIn PDF document text
    • http://asustainable.com/global/file/romuwixurujuwemedobili.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160afb3e3ee785---6415263817.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/142c7b2392787d71130ef6451864a562/wubomukekonudatifile.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/49473407708.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_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 19692 bytes
SHA-256: 4237a401c66281e109d8e95aedf22403632b8da6d64783079e024eb8b084ee6f
font_02_sfnt_off00013f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F38 10640 bytes
SHA-256: 7e14d89d0b5b61c1bac9dac7b8ada1eb89d75f3d07a0933cbec91f97c662b581

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