Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6d3096443353b1…

MALICIOUS

PDF

70.0 KB Created: 2021-09-20 06:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7c7639800cf0fbf909c184232e9f00f6 SHA-1: 863d65302dd66ceba41b2c1c63cda5d66c10fb7d SHA-256: 7a6d3096443353b10dbf23b519c5ef26c166c21b2de1835bbf900beb0616fab5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to potentially malicious or disposable domains, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://studiorapizza.it/userfiles/files/96081497078.pdf In PDF document text
    • http://rracc.com/file_media/file_image/file/55948340641.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/20529587373.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/bakejefasegakumijixivit.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/57740629413.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/97529558232.pdfIn PDF document text
    • http://yuli-china.ru/d/files/35935536350.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/memoluliwafux.pdfIn PDF document text
    • http://zae.me/datafiles/file/zupikatefudulowi.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/79678155135.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/madoxedukamepipilapo.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/44937047107.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/99138260855.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/nijuwurur.pdfIn PDF document text
    • https://noventa.cz/media/files/file/49570420264.pdfIn PDF document text
    • http://trivio.it/userfiles/files/zukotitapatobujojiveku.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/tobatekuseriwilurinaver.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/6797804514.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/vunepexiwidususotu.pdfIn PDF document text
    • http://carbonelite.ru/file/litisisututumixiruxaj.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/wekeveberujide.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/93462601033.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/rerejejunixatuti.pdfIn PDF document text
    • http://woodwaysindia.com/uploads/25096043911.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/56241611297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=configurer+yahoo+mail+sur+androidPDF link annotation
    • 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_off0000b367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB367 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB79 15192 bytes
SHA-256: ddd45c24d8c47d3391ea92c35cfbd19ce0ef7faf84df8879a00c14738e1e5df0
font_02_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 10948 bytes
SHA-256: 6e1d2b6e82c69d66632e583615c20a7d2ab15566b1a82198239af442ca4aac93