Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc3ed04c64a967d…

MALICIOUS

PDF

77.1 KB Created: 2021-09-09 16:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 152b58566adc028d23956f47d8362be0 SHA-1: 629af6ebf931390ae6d88225ea2ca5d9cd30675a SHA-256: 6cc3ed04c64a967d4e87ca251289e9422f2e8bde225c89506fdb5e701bb336ef
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external URIs, many pointing to disposable domains and disguised as search results, strongly suggests a phishing or malware distribution attempt. ClamAV detection and ML classification further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hotnews.md/upload/userfiles/files/66962171031.pdf In PDF document text
    • http://clean-ecology.com/Upload/files/velexurokawatexif.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/kologojitewas.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/soduladat.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/70663280828.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/lesapivisejusolat.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/novabebogadagetalilegiki.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210905043324.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132707e7fceb---98904307965.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/15553793752.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/775cb56ec9b101781a4f96492b9960f9/5391168669.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/kapazufadaxal.pdfIn PDF document text
    • http://manu-transport.com/documents/file/23875340375.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/29113731.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/15690117202.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/44991782601.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/64204362197.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/govomoweruginifuloludi.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/66682549728.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/rorewerovasumuluviretu.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/zobobidalaxixetolukix.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/fibipajetogofida.pdfIn PDF document text
    • http://chengzechem.com/upload/files/84731516170.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ra+one+full+movie+download+720pPDF 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_off0000c69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB0 18020 bytes
SHA-256: 020e5cce9e9f12ebac5719b90f0ffa1b46c38915e2c0e8fa005d4956c20e0e45
font_02_sfnt_off00010de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE5 10880 bytes
SHA-256: c0238ed8156f2f223e042b954ad90e8e772ad09be43262cc1b8e7d2b36304ff6