Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e49455d9763446…

MALICIOUS

PDF

78.9 KB Created: 2021-07-17 08:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cd2ec5401537cd2e00017bc143307726 SHA-1: 277e257643245f0f4347bc266820c13f812d785c SHA-256: 24e49455d97634468d5d92a07c56059ab24d5f729e5a2ca1b4a9d903df967abc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm with numerous external URLs, several of which point to compromised or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware delivery. The document's structure and the nature of the linked URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6046

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://eobliecky.sk/userfiles/file/mixapexaxapabuvesa.pdf In PDF document text
    • http://islandpointfl.com/userimages/61534402377.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/magezejik.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/kupiroxab.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/repuxutomaxezezowu.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f432a07f---68087479491.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/74299167241.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856206630a2---vexusazuwomanefetizi.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8de9dd268476fcda510d0dfed85e17c4/wonezegesetos.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/66435612948.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/ec0691b0ee3f468cf8c2bc229b865eee/jovetajenegedaxola.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/kiwuk.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ec2e1ec39---67801469024.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792bef4ac89---tugipemowuseparaxelin.pdfIn PDF document text
    • https://digireg.org/upload/79809093113.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d90312888---tegutipekuxenud.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/119e61c5d2629bc115d052bf789a5962/4753400311.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16096323506421---kanigekizatusepusito.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/kitixikidazarotajuz.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/45628092756.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/wijinexa.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/mezod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=multiple+choice+questions+on+cell+biology+pdfPDF link annotation
    • 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_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 16816 bytes
SHA-256: d27dcc0efbbe2c0fd9ed422ffcc6b6be5871be85922f30cc20d6270bc4428089
font_01_sfnt_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 11132 bytes
SHA-256: ef88284324775d52ac1f64dd5f5d4e9997f57e31686462f5d3c0d640d0a628f5
font_02_sfnt_off000127cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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