Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cde83b99229eee…

MALICIOUS

PDF

110.2 KB Created: 2021-03-29 10:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 897c2a7be3a42f101f4ab22ee1e13bc2 SHA-1: 7a9e7b47c68ba2f52c8e0f904c8f869a85510ba7 SHA-256: 72cde83b99229eeec741acca04ce35b94470aefb7d091d902887fe06158cee8f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URI and document body suggest a lure related to downloading an e-paper, which is a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it likely serves as a dropper or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/award?keyword=eenadu+epaper+today+telangana+pdf+download
    • https://cdn-cms.f-static.net/uploads/4472491/normal_6056d42b3ab8d.pdf
    • http://tuwawepizi.22web.org/88411891131.pdf
    • http://gemotebefid.22web.org/meponibefigixaviloxe.pdf
    • https://cdn.sqhk.co/woxiwovar/a2XIMwh/11_stone_6lb_in_lbs.pdf
    • http://jifanavigizan.iblogger.org/what_is_active_listening_in_childcare.pdf
    • https://cdn-cms.f-static.net/uploads/4450251/normal_6019a1e2e0ec2.pdf
    • https://cdn-cms.f-static.net/uploads/4476123/normal_60142e9b2dffa.pdf
    • http://vobarijijagurar.22web.org/system_administrator_interview_questions_and_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4408336/normal_603ba1ee506a0.pdf
    • http://xizadewakali.iblogger.org/gingerbread_man_story_moral.pdf
    • https://cdn.sqhk.co/terasovo/hfKgPic/crown_the_empire_songs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wiwamoxamo/11535796428.pdf
    • http://pojinagogaj.rf.gd/statin_treatment_guidelines_2018.pdf
    • https://s3.amazonaws.com/xajowu/building_information_modelling_for_construction_delay_management.pdf
    • http://tapomizo.rf.gd/jatulemudanavadatoxexuvaw.pdf
    • https://s3.amazonaws.com/tiniruru/deped_tambayan_grade_4_worksheet.pdf
    • http://sijopar.epizy.com/bosch_washing_machine_repair_service_near_me.pdf
    • https://s3.amazonaws.com/gateme/durable_power_of_attorney_form_kansas.pdf
    • http://mapitixonemo.epizy.com/8625184849.pdf
    • http://robajev.rf.gd/fluorescence_in_situ_hybridization_lecture_notes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010043.bin
542ad03bed161edd3c86c1f9a8003e6a9eb7a25d1d05da0736cd94bfcdc041c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 5016 bytes
font_01_sfnt_off00011179.bin
99a87ee052622b146d1d58028c8e6a8526c3bb4abf44435f2530fbc3a4b9abbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 53280 bytes
font_02_sfnt_off00017740.bin
c8beaa3d1c7f502b4554dd4c6078a2f1533d96652012fd1a38b4935fc3074918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17740 10892 bytes
font_03_sfnt_off00019c44.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C44 4324 bytes

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