Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a68b3029363e487…

MALICIOUS

PDF

79.1 KB Created: 2021-09-18 08:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebe66d0a3e5bbd7c739c91ffc11290b2 SHA-1: f9c7e8135dcf46c260a23c3cdede03bc8e453f06 SHA-256: 9a68b3029363e487b06d91913a1d564e9685e7f45a1aeb88a00237febc156cc5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs pointing to other PDF files hosted on various domains, many of which are unknown or suspicious. This pattern is commonly used for phishing or to distribute further stages of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://myappartement.de/web/editor/files/getasopipitedunitodikamas.pdf
    • http://onlineticketreview.com/images/file/bunut.pdf
    • http://gadkowski.pl/repository/filemanager/file/serapidoponuzuvidalawo.pdf
    • http://baovethanglongmb.com/upload/files/18457039159.pdf
    • http://www.uc-kushiro.net/images/library/File/60982157815.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/lirumafetexuf.pdf
    • http://marcelponjee.nl/ponjeefiles/file/zifajumaxovoradugepe.pdf
    • https://dalyanestate.com/userfiles/file/busazigorenigewi.pdf
    • http://stark-tools.ru/images/uploaded/tabitaxotapugezugotox.pdf
    • http://rebornfair.com/FileData/ckfinder/files/20210916_FA0810A12FE69200.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/nuvulaxepasuxetamax.pdf
    • http://style4.allwebeasy.com/userfiles/files/buvarazilexigosox.pdf
    • http://copy-office.it/userfiles/file/bavuxo.pdf
    • http://gzafjc.com/uploadfile/files/dofitad.pdf
    • https://pasationtravellers.com/root/FCKeditor/file/90780442568.pdf
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/pafuxakefogiloxexubexa.pdf
    • https://narellesastro.com/userfiles/files/18099009009.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/22fac9c6312d8e031b82753766c70d63/vexivezomedokipiminanox.pdf
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/silexopokogazudiduraribo.pdf
    • http://osstemcardiotec.com/files/fckeditor/file/121864951613d9e57c5912.pdf
    • https://bosingels.nl/ckfinder/userfiles/files/7879698425.pdf
    • https://agmatbaa.com/upload/files/89880570999.pdf
    • https://editions-tlp.fr/ckfinder/userfiles/files/mujovuniwi.pdf
    • https://ikuseikyokai.jp/ckmedia/files/85933222.pdf
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/jelag.pdf
    • https://nicklason.se/ckfinder/userfiles/files/96003583526.pdf
    • http://markaz-e-durood.com/EditorImages/file/kekekupibosuduvibide.pdf
    • http://interreg-ipa-husrb.com/downloads/gakefizifidujamixazi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+palms+at+crown+best+seating
    • 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_off0000cf55.bin
b4b8ea3e2bd2f8c7a923e6f1587e2b0e021e56b05839cf1b3e792b8bce86b474		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF55 11008 bytes
font_01_sfnt_off0000e89e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 16792 bytes
font_02_sfnt_off000100b0.bin
2e9589f5d588110671ed63985c5bc7261c2152eb77fe86f632a7f13dc422ca5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 17664 bytes

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