Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8a7607ca396e67…

MALICIOUS

PDF

72.0 KB Created: 2021-04-26 12:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4fce9dfd10bf0112ee6e034cc36494f2 SHA-1: c9e96947f0abd6ff9373e7bbb190343f3bf438ee SHA-256: fd8a7607ca396e6766f800ae9836e47cc4efe36cb56229d173a089651d384ddc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains references to 'Bissell vacuum cleaner parts' and the authoring application 'wkhtmltopdf', suggesting a lure to a phishing site. The primary malicious URL identified is https://dugedepap.ru/strik.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=bissell+vacuum+cleaner+parts PDF link annotation
    • http://carbackseat.site/book_of_forbidden_knowledgez85ys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456376/normal_5ff6aa2472f3e.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/ifn1Nhf/sarutemop.pdfIn PDF document text
    • http://qwert-ita.fun/turma_da_monica_para_colorirlbupb.pdfIn PDF document text
    • http://eurostore.info/gowosuvatatawo5okai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418391/normal_6004ea42c2e3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5ffd605bbb4b9.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/lhgicjd/channel_boster_sub4sub_like4like_view4viewer.pdfIn PDF document text
    • http://kajuzumanaz.sportsontheweb.net/comparative_superlative_exercises_elementary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/h_l_p_full_form_in_electrical.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_bbbaea206ad84101a47f9afb2875bf3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/kuwelitofuxuneluraxa.pdfIn PDF document text
    • http://womidelere.myartsonline.com/adnoc_salary_scale.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_7bf328cdb3e34e3e8401442651b28c44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/59590712018.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/python_programming_book_in_hindi.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_0b7991f55cde42deb6e5a92c19020285.pdf?index=trueIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_04524d629db3428e9e48ee85205aeab9.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_d21b6013343c4ce184d52bf72d3fffc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/bepuxopitudamogedox.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/14396884923.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEE 5188 bytes
SHA-256: f7cfa1766dc2ad97505b8f262b9e359c11e0202adac244aa5a57d79b066c5d5c
font_01_sfnt_off0000ee86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE86 10628 bytes
SHA-256: 7ed44477de904906c506b92de3800245065adda718e9a9d9882943fb72b476fb

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