Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fccd4c3af342ecf…

MALICIOUS

PDF

93.1 KB Created: 2021-10-20 02:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c756c3231e4d0635cddc82628cdfd9c4 SHA-1: 1c50fdaf2b5ee2f64a8133cb4efeae6bf2eeaf4c SHA-256: 2fccd4c3af342ecf7c39144fce54baf06eff21f0ddd761f1606ceb7b32e121a3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a large number of external links, 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 0.9969

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://marleenjansen.nl/images/uploadfiles/28112451249.pdf In PDF document text
    • http://phongkhamthienhoa.org/images/files/29533281217.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/jezovokofovifotuluv.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/92342734458.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/wugosokatesep.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/32326169246.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/lesoviromibatujidozatul.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/domujuwogevinunogami.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///subamotefabitivakawitov.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/29128947017.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/kumuxe.pdfIn PDF document text
    • https://g-mtcc.com/motakamel/Ups/files/goduwes.pdfIn PDF document text
    • https://alev.az/userfiles/file/wawokefemezenunuj.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/xililu.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/88223733762.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hu2idlrh2noiccfmlv94nt7st7/jopuwurufevawuvulo.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/29367890109.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16152838f78548---vetigiwap.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/tilid.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/jovolotupuwenukatulemivo.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/45141522477.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/23934580071.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/bowedinamasibis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/6Zflnl449io/uplcv?utm_term=the+secret+life+of+pets+2+full+movie+watch+online+movierulzPDF 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_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 18588 bytes
SHA-256: 1744b7b49c690b61f0122c7bb468d357a9436c726215062bb1bd23827bb89a20
font_01_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1D 11140 bytes
SHA-256: 2e23e8cca588f02482cfbdaa61518ff102e7ee3f403dfbab527775d83009cd16

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