Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dede0ce69c7ed45…

MALICIOUS

PDF

73.1 KB Created: 2021-09-17 04:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e385bc64edb7026aface75c43bc0300e SHA-1: 2cbe91c8fc965f275bd93eca80b4820c7026d846 SHA-256: 7dede0ce69c7ed454d9742f1cdad511dcd6996b3bece69247fb691b1440455f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm on such hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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 https://infrive.ru/uplcv?utm_term=sov+2+be+the+hero+in+a+movie+apk PDF link annotation
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613abb025c1cd---lotukobimixedunupu.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/jukatafopavodamujirewuj.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/55304226972.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/fijojow.pdfIn PDF document text
    • http://hybsch.it/upload/file/visekevapobifonusuvofaga.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/8612508084.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/pofuwokixevi.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/3771153738.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/bulifumewulutagesunuw.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-01-20-36-19-81.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/20368469262.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/29524852165.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210902023411.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/p7psfr0e0qafvj8iiao29lbpu6/muvarifazizam.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/51486844389.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210907140323_4gst2c.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/kasoxef.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210905_4FAE7F1828414C11.pdfIn PDF document text
    • http://wawa757.com/uploads/files/pitetulepolufevasezev.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/xafukopogivuzaxovowa.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/78910315878.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/29720788566.pdfIn PDF document text
    • http://unseretochter.ch/images/file/meposekuxegemuxif.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109091351106502.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/14646172172.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_off0000b8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D1 10796 bytes
SHA-256: 6a00bcee9c7fd0811da4129243355ab6948e7c507ba25d3d1bc05e5d480cee0e
font_01_sfnt_off0000d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 17684 bytes
SHA-256: b1232ec058c93cc59af5060f07f6a5c9a9d11f87eb5348e5ffee2d48ffc92833

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