Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1274d5f479f4778…

MALICIOUS

PDF

81.2 KB Created: 2021-09-21 00:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 725a08ac8f3bfa422e896ac6de6e2bea SHA-1: 9d041999b6692051554570ae1afc913e9ba564f9 SHA-256: e1274d5f479f4778680d68c927e0f2d6e87913cd3edb168330c99229e0f2a8ba
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, strongly suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection further confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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
  • 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://kitapkaplama.com/upload/ckfinder/files/9342070567.pdf In PDF document text
    • http://altinay-law.com/images/file/61487994979.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/46630308538.pdfIn PDF document text
    • https://10fci.org/userfiles/file/52662305818.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/pugemenewotu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d2e55881e---73398144321.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16144baf76c827---94312637694.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/69362328248.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/rusopejiwujezusuburikow.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/79816115320.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/59204267393.pdfIn PDF document text
    • https://ratosatu.com/contents/files/dixuzupudosutivifi.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/26764425385.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/tuvemapokidukoj.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/totuworepuxofuxuvaf.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/40877620343.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/80998680691.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/46996718901.pdfIn PDF document text
    • https://izometal.net/mm/file/lesojibodesuvujijuzogiso.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/gosisulorobegonatim.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/jafufuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=example+of+simile+metaphor+and+hyperbolePDF 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_off0000d7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A5 11104 bytes
SHA-256: 480b6bb7163fe536e910bcc6dac89cb5909500cfa705ee3288292cb23a2a2c96
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 17608 bytes
SHA-256: 9ce41cb1f7bb5711fce63ed4faee24e30de72e0641122e50a92c428649ddec6e
font_02_sfnt_off00011ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.