Malicious PDF — malware analysis report

Static analysis result for SHA-256 943ec5fe9659ff4f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-18 08:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9260fe68b4e1cd2f11e98c4f7b4c396d SHA-1: dcdcdeeb32bcff8d5718007bba504beacd699ad6 SHA-256: 943ec5fe9659ff4f6b5960d22a4061899594590c5660d7d3962d06812101d390
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of external URIs suggests the PDF is designed to redirect users to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=how+hard+is+ib+math+aa+hl
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5fdee62f3db85.pdf
    • http://kazexajisodibu.medianewsonline.com/55664017546.pdf
    • http://nituzovido.getenjoyment.net/calories_in_fresco_style_taco_bell.pdf
    • https://static.s123-cdn-static.com/uploads/4419204/normal_5fff95dc357e7.pdf
    • http://digovin.getenjoyment.net/the_real_guitar_book_volume_1.pdf
    • https://cdn-cms.f-static.net/uploads/4388158/normal_6016387fa548b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_e98ad3e30ece40758c1c62c8e6c61f29.pdf?index=true
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_0f80ff7c20474688adbacfa66c3f7f15.pdf?index=true
    • https://s3.amazonaws.com/tuxenipup/midabuwiwezibixefaxale.pdf
    • https://s3.amazonaws.com/lofese/share_chat_ringtones_telugu_2019_love.pdf
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_5c0ab03c7e1243eda11ab481338e5a02.pdf?index=true
    • http://zenakezogutomu.onlinewebshop.net/18066474709.pdf
    • https://s3.amazonaws.com/dotivaf/14199425295.pdf
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_5b7758188f63465b862b9a23a8adab21.pdf?index=true
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_1107cf8d23db4847aa3bc973b3f98795.pdf?index=true
    • http://futikuzita.onlinewebshop.net/doxor.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/84392772414.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edea.bin
0a142ca037048cbb767cb142743878f75b7e9d6022caa9cc923d05639425510f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 5256 bytes
font_01_sfnt_off0000ffa7.bin
807a563c0eed787b0dfdd67c6298a30a3e136b47bb9856da1c77ddef9508a006
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 10736 bytes