Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6229cc8d5ad5f0a…

MALICIOUS

PDF

75.7 KB Created: 2021-03-09 22:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ce867875c6dc59f71dc20498d34672b4 SHA-1: 98084644574cd0a8f3183bf2e25332fe7ea242c8 SHA-256: c6229cc8d5ad5f0a91790def64158a923c0923aa9fd9f4ee47325c58a5bd33cc
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URL `https://xajibur.ru/award?keyword=english+language+arts+lesson+plans+for+elementary+pdf` suggests a lure to a malicious site, likely to deliver a further payload or phish credentials. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent, possibly involving embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/award?keyword=english+language+arts+lesson+plans+for+elementary+pdf PDF link annotation
    • https://cdn.sqhk.co/kavejufa/lFNifih/96948520672.pdfIn PDF document text
    • https://cdn.sqhk.co/geradaxezum/ejc0ihe/96244890394.pdfIn PDF document text
    • http://fesilax.22web.org/centralized_and_decentralized_management.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_5fea15542d34f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_602b87dc4c7cc.pdfIn PDF document text
    • http://jegotaraxipux.iblogger.org/cervical_cancer_screening_guidelines_australia_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/ji0NjjJ/flight_tracker_alaska_1002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422638/normal_6001ed8e4d6ca.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/dzdkk1D/wivaxaxapumunozivizeru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379359/normal_5ff034baa8052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477877/normal_5fdb397fd9619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwufofu.epizy.com/pajanolakufa.pdfIn PDF document text
    • http://gejopap.rf.gd/angular_material_formarrayname.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/apple_mobile_device_support_service.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/carryon_my_wayward_son_supernatural_episode_200.pdfIn PDF document text
    • http://selafaveso.rf.gd/bevars_movie_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/ielts_task_1_line_graph_sample_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/ie-_2000-_8tc-_g-_b_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/dudisoduwapijod.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/pamuto.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/fezuxuf.pdfIn PDF document text
    • http://tujiritam.epizy.com/bazel_android_test.pdfIn PDF document text
    • http://mefadagisi.rf.gd/free_durable_power_of_attorney_form_alabama.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_off0000ea42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 5512 bytes
SHA-256: fc9145fd40627ddad678584871d19e9de510776e8811c7d79e7781f015da3ba6
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 10608 bytes
SHA-256: f0569c0ecf1cebccfa4ac45127752203ecb984a3003c752e07fbeecfdfaef191

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