Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0171bc8f760e406…

MALICIOUS

PDF

89.0 KB Created: 2021-08-19 01:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a9b697dc6c178a3fa2ba989afeea58e SHA-1: 8bb0f6d3676d909a50002daf04b7b91673cb1462 SHA-256: e0171bc8f760e4069abfffaeb32f3bb89ee06423eff859ce722d5cf9a9f83e02
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=teoria+endosimbiotica+pdf PDF link annotation
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/446b6bf0d4cf033df0e9f875c3c3c041/xukemato.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/rbqanj8n84m26c4lombfl68bq4/28690052464.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/31095030900.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9a936ba77---xuxotadaximelewel.pdfIn PDF document text
    • http://peak-experience-japan.com/jumaxipesirojugapewupixe.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/relof.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/gigepur.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff3af7d7c1---fokas.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/68ce09d31f561c6a76fcd1d7ed5d3823/benonugerafoso.pdfIn PDF document text
    • https://abeess.com/userfiles/file/57629098981.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f79a92794c2ebbc8625a3fb9e235d590/6919505524.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/74894394262.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/44178791336.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e67b11ad3b---48766394250.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082de6e94f4e---59508339559.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/mofifivufufexitaposunuwi.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/92578370926.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/617c699e0f6806c42f897f8de2b57448/24096317544.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e9c89902d---93106185179.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/xovun.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/kupegadasu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dea8bed56---mukegaxuwa.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/cddc2d10ca1bcfdeb58a7598e02d6b04/karoxumukusemeweze.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c695efdd45f---34532706478.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_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 17540 bytes
SHA-256: a276837a6b8d34d79559553fdff9965f48412f2856d4d62f96f2aef2115a6431
font_01_sfnt_off000122f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F1 10836 bytes
SHA-256: d72246f86448ccf4721d65fdbcaef1d6565090de442102a0e07f4fcd71630320
font_02_sfnt_off00013bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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