Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f3bdbff753bdcf…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 15:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1381fa3d1a63035d7619e441b586b50 SHA-1: e584374864be8662b44065d0ea1ea2b8fc158772 SHA-256: 04f3bdbff753bdcf023a87ecef66f13a4f4f20236c24826c1bf52d19c976c83c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which point to suspicious PDF files, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bestbelly.org/content/files/files/wexekodopabutadazaxanes.pdf
    • https://autotronics.vn/userfiles/file/rimojevageropanarewe.pdf
    • https://sindonis.com/userfiles/file/kevavufavifaremenepufom.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2a6d3c9b---tefukibamizidunaxavumer.pdf
    • http://rlangkhan.com/upload/userfiles/files/sarajupoduderudirobobefe.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8ad778493---tujiwinopasesarelutekebuk.pdf
    • http://aarogyamedico.com/userfiles/file/ditonasiwoxirusavobidi.pdf
    • http://markone-tools.com/upload/files/siwoninajexufififebif.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083c933a2789---kexejonugikubex.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/62b2fb3d5545f5ce0195614302069919/tekajorovujekawu.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2689507523---80964437867.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d981bb3788---50729084463.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/05fskqgm7te74bnrj3rke5d5u2/34201571050.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b07534369---44607283914.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/222f912c76434c232367a108e24807a1/11445009049.pdf
    • http://edu-family72.ru/content/images/uploads/file/fifedidajibuga.pdf
    • http://chixue.com/uploadfile/file/20210612145212.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8rg5hqamn1dvk3vgn031522l63/4821026724.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4b837245b---64347557012.pdf
    • http://szao-spb.ru/images/news/file/54762519651.pdf
    • http://schmetterlingsgaerten.de/file/38331324824.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607659b2ac921---10031052526.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b27db1f36a8---19309130419.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=free+sports+streaming+sites+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63a.bin
3ef1ae3f21f247fd62fd874ab7b9223fc199ebbf40d15815ee4c208940f8b170		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 10772 bytes
font_01_sfnt_off00010ecd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 16792 bytes
font_02_sfnt_off000126df.bin
4758c284e77a4fb57209d86680afe50a76c609830e0453b72688bf70eae2b19e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126DF 16788 bytes

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