Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b6440f7fda93f5…

MALICIOUS

PDF

80.2 KB Created: 2021-09-19 05:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 38d54544a88cac8fd2ab49ddc47c53f0 SHA-1: c7bc8906a2abe93cca8bf83bcaf121065f0341bb SHA-256: e9b6440f7fda93f569e9d8f6e6b733c1adb468cd9f2537022008e82f481e68fb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, including one that appears to be a lure for 'delhi crime season 2 watch online free'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links to disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=delhi+crime+season+2+watch+online+free PDF link annotation
    • http://www.northern-japan.com/image/upload/File/43795067488.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/gerowuzozesoxeso.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/84680185358.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/f585471b6d2925570010ed98d46c6b1f/rolarimeropefelazadiko.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/kodudona.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/dikegazudepeluputuf.pdfIn PDF document text
    • http://medica-brno.com/files/70772448913.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/juduvafela.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/fifojixatuw.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/kopawikijawusuvifumi.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/30933560190.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/55560973977.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/78925266435.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/64288840389.pdfIn PDF document text
    • https://riolisboa.com/images/ul_files/file/3sGRN9JExlmY.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/wavenovomidikosif.pdfIn PDF document text
    • http://ihdbd.org/upload/files/tejewomajaxusuvurumivupi.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/14665765997.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/xojisatoba.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161408c2cd312f---17291807153.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/1630426089.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/fogizojogifemazafofu.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/41526586304.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_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 17080 bytes
SHA-256: f0b57b5ab673043452e8c984a99fb81f018426fdedb16399db4310114af75511
font_01_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD5 10808 bytes
SHA-256: 4e86aef2715c022f402c2cea72a8499bfd6f239db9a16e3ba0c511223b81d1e4

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