Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f367cfc88575c3…

MALICIOUS

PDF

86.4 KB Created: 2021-09-04 01:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3ad8580be6af8fdc6e271e336111a10f SHA-1: 840e92d189d5ad28a662f8a8f0ad652eba436f92 SHA-256: 80f367cfc88575c363151f447f7bbd66ac26440ac2b071fcdf151baf6c0479b8
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious or phishing content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=walgreens+sunbeam+ultrasonic+humidifier+model+700+manual PDF link annotation
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f4ffdf4d93dea5756c4b45ccf1d76685/74010413078.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/tagejo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16081ff57349e6---3503260992.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/tevafo.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/386b6fe47d4549d61e1e7a8cb501cd2a/kaxifukafuwekigaj.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/bcnfot6431eqj118m60opdg0kl/vesurizimukoviserafekixo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16090c4964be40---vejigodekotogid.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/tipowaninolopuvimo.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16084063d10378---xupijasarivejuzujuwu.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/35423907133.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210803020855.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/14672797539.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/zukosesaxatefeviredaj.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/bijisaxumugiso.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d39715dff---42487208140.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0774197f2---12677095024.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/witajagefi.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/gularudifa.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/61c0063eb0642d7640d1571eb7659807/52123590558.pdfIn PDF document text
    • https://educhina.mn/editor/files/kokematuxoritoga.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/72615123075.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/5pqr0v2tc0nfv9irdjto8qccm1/josozawepilutojujutem.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d31c2ab863c20405403499bb874a5903/557727456.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/13423255c057c2146a6fb390464396a7/43310047733.pdfIn PDF document text
    • https://cubic.is/userfiles/file/58163587765.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_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 20520 bytes
SHA-256: a310e29cae8dafc8a8127754eaaa7efccd355756f5510857bc9d724676852e80
font_01_sfnt_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13122 11328 bytes
SHA-256: 2aaa8e353c6d4dc5adc3566ba561fd3a7f11e168bc2a34f0ebdb73407b7bd064

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