Malicious PDF — malware analysis report

Static analysis result for SHA-256 26373322892e06fa…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 13:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a77488180ffe639638c16a45971e9145 SHA-1: c43ab9feaf61fe217205402e9f609c0f0f13fb5d SHA-256: 26373322892e06fa9ed33935d980d201c998a0ead8ba5b067aec987d17d68454
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the presence of numerous links on disposable hosting, suggesting an attempt to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://tipiland.net/upload/file/wozugululorirowixiposuvon.pdf In PDF document text
    • https://petikdaun.com/contents/files/57158504242.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/dewetog.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/81172333223.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4521eab41---rutulogomeloxo.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/73299631563.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/sewutopuvuwebabuxoduf.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/wosexarok.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/ralipubidegunazufivepap.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/suxox.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/fezunuvawesuwa.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/86383109844.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/21162865987.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/beperifesigepa.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/4183402782.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/kamajebakojonoguba.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/2169279114.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/fidemesubupoligu.pdfIn PDF document text
    • https://luminex.pl/upload/file/laxutivoteniwikopelevixi.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/69826290080.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/wuzagifiwalumakotazedub.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/bubaxinitewoxenigogifa.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-11/images/files/92710668310.pdfIn PDF document text
    • https://matratva.in/userfiles/file/vupusevobefasedatasenidoj.pdfIn PDF document text
    • https://bdata.vn/upload/files/libivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=jinde+meriye+punjabi+movie+download+filmywapPDF link annotation
    • https://mediaget.com/userfiles/files/senusajezub.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_off0000d6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B9 11020 bytes
SHA-256: fd1cd0e1ef308f748aa91b6031717c2135eea4a6992c99f54754a30ed7d854f9
font_01_sfnt_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 17780 bytes
SHA-256: ae7f922f6a9116c41405a160db341021610c223cc1fd485521239019578a3634
font_02_sfnt_off00011e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1