Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0df036850cbce66…

MALICIOUS

PDF

83.7 KB Created: 2021-09-12 16:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dc1e99c2dd815208de321c10a5c05dfb SHA-1: a2c91e69de6ce79893b73a5677d18583d801e412 SHA-256: e0df036850cbce66abf9b93ef69395554d4ca89267b4e9006f2d7243e697d8dd
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the presence of many unknown URLs points to a high likelihood of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • 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.
  • 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://fenixfalt.com/userfiles/file/49560753691.pdf In PDF document text
    • http://envigest.cz/upload/file/16688445362.pdfIn PDF document text
    • https://uzsienis.cvzona.lt/resources/img/files/zobotawaseverovog.pdfIn PDF document text
    • http://tnhmc.com/userfiles/file/koterexeleni.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kbbl3gjb1enukjn8h6pfgu6f63/lidevevesat.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/85717886447.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/21077540502.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/32389117921.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/bozurivijibakoku.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/jexuzirubapulibot.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/savugojibanogora.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/pujudabufizaragofujiz.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/kazufig.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/32689969165.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/dupogiterowurovusovu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6ff8ebd252b2b54709071fc66afc796d/52937183685.pdfIn PDF document text
    • https://anaksemut.com/contents/files/80429607157.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/degojenapowibaduwotope.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/15976348268.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-2/20210902204825132397.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210909082734.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/90729968304.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/90298818784.pdfIn PDF document text
    • https://kapefashion.com/files/files/bazavedezujugumomudono.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/burixiponojuj.pdfIn PDF document text
    • https://lp-tracking.com/userfiles/file/97174071966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=a+quiet+place+part+2+near+mePDF link annotation
    • 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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 16908 bytes
SHA-256: 92f704c83dc7e8ee362f170a6991c2dc3773b51bdd03e3d7f2da781b469823c0
font_01_sfnt_off000110bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BC 10596 bytes
SHA-256: 627c724c7bc32833d77fab04c9a0ac9d7d8f7ead1219ef676dacc8970ee95a9d
font_02_sfnt_off000128f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1