Malicious PDF — malware analysis report

Static analysis result for SHA-256 3682172107a8cbcc…

MALICIOUS

PDF

80.4 KB Created: 2021-02-24 02:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7c07b8b87655412face28cae0e50f44a SHA-1: 018249025f5f5f70a4d37b4c3cf26a2701c37968 SHA-256: 3682172107a8cbcc1325fd386cb33ac8ffa6a0c60d51d00a4dd7badb6a455e35
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured as a link farm, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wb?keyword=ifb%20top%20load%20washing%20machine%20error%20codes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486061/normal_5ff3feb5a11db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369776/normal_5ffd992bbea96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5ff252bc4c837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5fdc4ed1a416a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_60257d188f43e.pdfIn PDF document text
    • https://doxabonejanowi.weebly.com/uploads/1/3/4/6/134669922/1617579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472188/normal_5fdef9002b2b3.pdfIn PDF document text
    • http://gamokidawenikon.iblogger.org/1685860404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_5fc8e28ba5669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teruwizirazi.rf.gd/xetotofida.pdfIn PDF document text
    • http://kadonimefimewe.rf.gd/netflix_android_4._4_2_apk.pdfIn PDF document text
    • http://xilidutajomode.epizy.com/nusogufetewaziwis.pdfIn PDF document text
    • http://gubadix.epizy.com/creating_checklist_forms_in_excel.pdfIn PDF document text
    • http://rivudokuji.rf.gd/zavige.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://scripts.sil.org/OFLIn 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_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 5736 bytes
SHA-256: a24c3c0a93538b64953cfcf95a468f4ae0368800758eb53d3ae565e8df769646
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 10444 bytes
SHA-256: 53d686b77e49aaa5f53dc5d9fc1d644edf5b8d7ed3ef64e49dd3583714927721
font_02_sfnt_off00011f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 16148 bytes
SHA-256: 5e0beb1f3b6ff7b88821b0a107d2bc3d4bb89b18693e211d961f98fe16b022c8

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