Malicious PDF — malware analysis report

Static analysis result for SHA-256 216448364889f594…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 18:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93209c1defbecc0a9d15bd8e9d347386 SHA-1: 1f1e60841546e01699872ad1070799e4543d49c4 SHA-256: 216448364889f59462720ac1558e6323be536bdc857511186fd85b4a27d02341
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://lideparts.com/userfiles/file/1630950799.pdf In PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/61520030831.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/dejewuzovosefurokiviz.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/kuwofasewikikuzinab.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/17747952337.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/kekedeporamuzuzisar.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/modirepujugot.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/d4e543a534c2c304360a721b41a5981f/52038517382.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/51727069057.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/78648929187.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/xulukizarajuwozova.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/sibalerusa.pdfIn PDF document text
    • https://grouptm2.com/contents/files/xunagenipide.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/fuwinotagafapatodesi.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/66021198952.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/26474692909.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/23555947917.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/11691134588.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143224c4c5c5---39655850022.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/bekolosekurufoxozekazabux.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/bamasiloxote.pdfIn PDF document text
    • https://shidoremicrosys.com/media/97178734669.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/62866436350.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/42044534330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+english+file+intermediate+third+edition+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC166 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_01_sfnt_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 11032 bytes
SHA-256: a9c6e75d3145f5e53e239a055d38d694a7fce85a892b0a776e8e1139961aa04f
font_02_sfnt_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 19544 bytes
SHA-256: 9f878c9d2f623e85066f366d473852eb4319672fea40354f95b9117d6df12d3b