Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47203d7447e8952…

MALICIOUS

PDF

86.0 KB Created: 2021-09-12 17:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bea9191121b5ff6e01d80b45e98e6f76 SHA-1: d989aa924d719882b981b97a175a4fafa94fdc98 SHA-256: a47203d7447e8952088bf4ef84646414531f8023268e8265f7782d2fbce6c701
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this, pointing to a tactic of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=love+after+lockup+season+3+episode+1 PDF link annotation
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/xanaxulutedenebidodi.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/bidikupiwuvonevala.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/19683652081.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/kevamekowerozafawagusimos.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/pukakiwekaweb.pdfIn PDF document text
    • https://areicon.com/images/file/kevomof.pdfIn PDF document text
    • https://izr.fr/files/jemitemej.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109080837017044.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/70835592349.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/fesunivabewunimobu.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/46962188763.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/dakejawov.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb64c38c9c---pekenagamiluju.pdfIn PDF document text
    • http://christopherdallo.com/file/33637147360.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/vororajiramejirolig.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/sarutaxiwubuzuranozepa.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/nemetotofasezovavusires.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/98226175908.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/tulofifepal.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/nudofewawagudatezolototog.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/94473020781.pdfIn PDF document text
    • https://fond.ru/userfiles/file/morijulagujusizudek.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/81450335660.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109071257524901.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/87281489064.pdfIn PDF document text
    • http://sbkf.org/files/files/tasorew.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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 18328 bytes
SHA-256: f29ebc863bfed877de8c2ad9ea02360362ef53cbe43fa4b30188ef9edfb02805
font_01_sfnt_off0001187b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187B 11052 bytes
SHA-256: c6f7d7108c607df71be817aa2ee86c212fe8a5140c926853d24828967618282f
font_02_sfnt_off0001326d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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