Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c54b72a7f5302e…

MALICIOUS

PDF

79.7 KB Created: 2021-09-23 01:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 278627dde00f07dde348cb0db5664124 SHA-1: a1b0e874b7acfda2eae931cea6a63ff58b3654b4 SHA-256: e2c54b72a7f5302eda0eccf42f26bd24a4bb4de8115815264c0a5d25e12400ef
132 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The embedded JavaScript stream suggests the potential for further malicious actions, such as downloading additional payloads or redirecting the user to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

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.
  • 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
  • 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://queure.ru/uplcv?utm_term=mod+menu+apk+avakin+life
    • http://ouhkpthaa.org/userfiles/32386001883.pdf
    • http://zavalinka.by/var/upload/file/lunifinumugugoroluvonulon.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb34818b8f---64695641563.pdf
    • http://jfhconsultancy.nl/userfiles/files/zojesata.pdf
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sutedorilavowotapexona.pdf
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/44188711505.pdf
    • http://verduciautodemolizioni.it/userfiles/file/92234315445.pdf
    • https://iuoshili.com/upload/users/files/modulexawogavagevon.pdf
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/58547287605.pdf
    • https://tyko.pl/userfiles/file/wazebade.pdf
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/29296343651.pdf
    • https://highlander-inn.com/assets/userfiles/files/fejozukafelewimawivi.pdf
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/dejidosuboxalurulat.pdf
    • http://carrozzeriabosini.net/userfiles/files/kuvigasixatu.pdf
    • http://emekyesiltepe.net/images_upload/files/zaparurebidirowufirojuxeb.pdf
    • http://miskolciharsona.hu/pictures/file/35563315229.pdf
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/kukobezolozifawonom.pdf
    • http://phongthuydotho.vn/upload/files/remimog.pdf
    • https://leciv.fr/uploads/FCK_files/file/5157976054.pdf
    • https://autosaloncenter.com/uploads/files/bubomovidogotodopipu.pdf
    • http://recuva.kr/upload/fck_img/1632196055/file/soxuguregavit.pdf
    • http://cpils.com/userfiles/file/zarirasijupedeniviveder.pdf
    • https://www.seblocation.com/ckfinder/userfiles/files/74015005300.pdf
    • https://www.truck-transport.com/ckfinder/userfiles/files/tepawifufasutotuvepuzoba.pdf
    • http://logopeda-empatia.pl/content/file/80772464660.pdf
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/46652382648.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75b.bin
77b950aaa0c0e61511c9fac4a574ebeecc046fa72d8249af83696668e49f4a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 17668 bytes
font_01_sfnt_off000114ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 16792 bytes

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