Malicious PDF — malware analysis report

Static analysis result for SHA-256 030637fe7e0359a5…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 04:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6971a6ed6128f7d981d38aeddc192769 SHA-1: a320e802a189e1d5e82c6d21d78849a4eaa982e4 SHA-256: 030637fe7e0359a59a880ceb572c64a5b1c0fa51d10cec1dc7c1e5c178e8f382
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://erdemlerkoleji.com/resimler/files/wajitelesadisogigagukorim.pdf
    • http://studioriggio.it/userfiles/files/fovubejef.pdf
    • https://akconta.com/uploads/files/juwozakefejemewobalepof.pdf
    • http://erbaytag.com/resimler/files/93590847515.pdf
    • http://songpinhao.com/userfiles/files/53975997303.pdf
    • https://adepotcustom.com/UploadFiles/file/20210902131143124.pdf
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/wewowareg.pdf
    • http://superazs.ru/images/news/file/7899582132.pdf
    • http://daugiavanthienphuoc.com/media/ftp/file/82262029289.pdf
    • http://serenetour.com/image/upload/File/dedisetodir.pdf
    • http://airsoft1.ro/files/file/sizorafod.pdf
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/tevavuxokupel.pdf
    • http://hasomedia.com/userfiles/file/1608067521.pdf
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/lonariperakozusizomokabu.pdf
    • http://elvirajogsi.hu/ckfinder/userfiles/files/66857072857.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613be0e2cb9f9---43844619396.pdf
    • http://asude.istanbul/ck_images/files/xamukitinuvoxanibutaw.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea20478cdb---vaviwadimofotir.pdf
    • https://optical-axis.com/uploads/files/202108311853306827.pdf
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/tumuxifapupizovita.pdf
    • http://soepcentrale-dekeyser.be/userfiles/file/62192986639.pdf
    • http://geoodwierty.pl/files/file/81229070338.pdf
    • http://lammermoor.net/imagenes/file/55857481622.pdf
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pudisijote.pdf
    • https://reazfarah.com/ckfinder/userfiles/files/lonizagid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sites+to+stream+football+for+free
    • 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_off0000e212.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 16792 bytes
font_01_sfnt_off0000fa29.bin
804db3af72793575ed1e098b4992273d8a316a9e71bdba9f152498f3bef4ff1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 10488 bytes
font_02_sfnt_off000111ff.bin
3b357bad9c57a7963b4357c3c2b5b1078e0d517d7d36f152a9882249553f199b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 17200 bytes

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