Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f74e8059408fac…

MALICIOUS

PDF

67.7 KB Created: 2021-09-15 17:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cf7ec5ca39debe00334a972c95eea016 SHA-1: 3ffd1cb14d663d66aab8c4a270282488d036a7f3 SHA-256: 22f74e8059408facae22689f804b2d634366b2e1baed0ee14b082c9e150aa8c4
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8303

Heuristics 4

  • 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
  • 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://mycoapaisyl.com/webimages/files/32337107404.pdf In PDF document text
    • https://egc.ecrom.work/syo/files/11071316132.pdfIn PDF document text
    • https://southafricapools.com/contents/files/99088826873.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/1525281369.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/54061154096.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kimanozemedi.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/19937300985.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/momazo.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/78814991421.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/57060163243.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/1d540a66d7c04f66bfbbd7835cf29fce/77288279663.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/jigatu.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/69672434083.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/73135756793.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/zozepenojegusokez.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/92328273492.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/12547361033.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/vijubofaz.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/27836375560.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/20262284921.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/jalelizuwokejogevikanopu.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/84037311860.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/wimotixizinufefuz.pdfIn PDF document text
    • http://health-bridge.in/upload/file/rexiju.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/18076209276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=gnula+play+tv+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 18948 bytes
SHA-256: 9f2acc4cd377e30c6782a6c1b73bd820beaef8c67cbaf52cc8fe4a8ada42bed5

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