Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0b47098c30ba6f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-18 09:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0153b466bfc0c335d49343830afd5e7d SHA-1: 9957f565342ed5c8aa5fa3a3a46caf66da7ddd27 SHA-256: fc0b47098c30ba6fd0fc024d2878d565dc91a1e1794e8f6b753f85ca0fe71cc2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and a large number of external URIs suggest the document is designed to redirect users to potentially malicious websites, likely for phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=order+of+operations+interactive+games PDF link annotation
    • http://k1a.ru/images/files/file/82289046922.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210911063826.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/82352425465.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/30610759251.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/73947416119.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/32489561836.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/0cb04c34ddcc1905c42471ec2bf35aac/ruwokavobukasolon.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210918013503_ex09r1.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/2529212375.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140eda76607e---sevemozovi.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/tolakezuboxu.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/48039179387.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/rupil.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/17394819560.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/pofuzi.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/85323541790.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/zafunudowakawamogesese.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/88119031494.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/wilifajutuvut.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/36901159585.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210917062053.pdfIn PDF document text
    • 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_off0000d029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD029 11008 bytes
SHA-256: dab6a39db5227ba2a4405a63a868a6c29d100946785397cb49a7bf5fd5304f77
font_01_sfnt_off0000e99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 18220 bytes
SHA-256: 23c8c89e2ae5c88e02a4020d84b84dae42d7ee5e507b57171da252dbf3538db8

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