Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67474adc63bb5b2…

MALICIOUS

PDF

76.9 KB Created: 2021-09-12 07:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 074a17dc5bc385686dd54d907a641bf4 SHA-1: b2665c1aabd5cd8d204da21911c2021fd0836807 SHA-256: b67474adc63bb5b2eb34f963345371120d8e0991927fb1afe6aca3584a0e66d5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware. The embedded JavaScript is likely responsible for initiating the download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://charteriraq.ir/basefile/charteriraqir/files/37324688581.pdf
    • http://topp.pl/_topp/file/faweguporib.pdf
    • http://dycelife.com/userfiles/file/47544882987.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/balavevedeso.pdf
    • http://zhhyhb.com/uploadfiles/files/livakanamafaxadop.pdf
    • http://avatars.ru/userfiles/file/18265213872.pdf
    • https://strategieb2b.com/userfiles/file/riwafopovijo.pdf
    • http://newgoodluckcrane.com/admin/uploadfiles/file/jevomimifiwepuweminojat.pdf
    • http://kanizsakran.hu/userfiles/file/fopeta.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46222659511.pdf
    • https://lanjutpt1.com/contents/files/pudezaxejubusi.pdf
    • https://elitstroycraft.ru/source/file/20390824975.pdf
    • http://anninh247.info/upload/files/sitibezijumab.pdf
    • http://primeasset.hu/fileok/file/merireronerajodoto.pdf
    • http://mintaialuminum.com/d/files/89674133588.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/b756135d05704045e8b02632488e6446/96441464251.pdf
    • https://kiaavcilar.com/upload/ckfinder/files/2128541788.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/f2f3807b81a9ffd8ed96066d782c322d/85369525290.pdf
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/vovujelurifegawojuk.pdf
    • https://jf-orvalho.pt/userfiles/file/linumumum.pdf
    • http://hpworld.hu/data/pic/Image/file/24709954383.pdf
    • http://vagtteam.com/userfiles/Files/33213570436.pdf
    • http://purel-biopharm.com/upload/files/83718163265.pdf
    • http://arhive.np-sp.ru/img/file/3132338882.pdf
    • https://doluhosting.com/calisma2/files/uploads/26036678678.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=android+tv+launcher+apk
    • 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_off0000c897.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC897 16792 bytes
font_01_sfnt_off0000e0ae.bin
31b8429ddb8441dca772602fb6e71566f527c588de8840d150100892d538aad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 10684 bytes
font_02_sfnt_off0000f91a.bin
00e887385584c3b5ffe38439306aa841f21f20745142ce9ce6c6ec48885ff66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 17432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.