Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9c38fc2178107f…

MALICIOUS

PDF

84.9 KB Created: 2021-05-15 22:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14026d79008f7ca59d8fb97d49dfea34 SHA-1: 4ff48e6c7356296fadc56b2a54feb1b74d36015b SHA-256: fd9c38fc2178107f5954cdccc9bb142f32ce32c3c536e4d920922dfc30cc9c4d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'historical crime fiction'.

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://ponafet.ru/strik?utm_term=how+to+write+historical+crime+fiction
    • http://lokogosomezik.iblogger.org/commonwealth_of_massachusetts_annual_report_online_filing.pdf
    • https://cdn.sqhk.co/nejibija/1hb5YJB/36253479046.pdf
    • http://tebapewulodafe.getenjoyment.net/what_is_the_significance_of_the_golden_candlesticks_in_the_crucible.pdf
    • https://cdn.sqhk.co/wavagowew/gfuhdol/dukanomemivosoz.pdf
    • http://wivaserana.mywebcommunity.org/journal_echourouk_algerie_aujourd_hui.pdf
    • http://bovakepixoworax.iblogger.org/amazfit_bip_watch_face_ios.pdf
    • https://cdn.sqhk.co/dedejosewor/iiT2gha/dj_music_mix_download_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3a634747-a364-4ec9-ba10-4c93bd7af836/wojagavokobutofotazafunid.pdf
    • http://wigikel.rf.gd/psychology_chapter_3_class_12.pdf
    • https://uploads.strikinglycdn.com/files/00f97032-5239-472c-a770-06a4a81ab2ec/can_anyone_get_a_covid_test_in_california.pdf
    • http://fazovalekotevo.onlinewebshop.net/diablo_2_remastered_mod.pdf
    • http://kosezofejesuxef.atwebpages.com/wonder_novel_study_questions.pdf
    • https://uploads.strikinglycdn.com/files/0b7bbc4d-dfa5-417f-9a14-8818a9db47a2/piposozokakasosuwirilogev.pdf
    • https://uploads.strikinglycdn.com/files/dd322ba0-4452-4585-b112-82633a8d67a2/how_to_make_concrete_blocks_machine.pdf
    • https://uploads.strikinglycdn.com/files/3467405f-f5da-418e-9df3-2a9fdcc88035/saguzopudepuneti.pdf
    • http://likutolejit.onlinewebshop.net/cambridge_international_dictionary_of_english_download.pdf
    • http://mozilerinalut.epizy.com/88753935872.pdf
    • http://zafotuzovis.epizy.com/how_to_file_form_gst_reg-21_online.pdf
    • https://uploads.strikinglycdn.com/files/d5c3d37d-0b57-4ec1-a43b-27b42df145c3/radioactive_decay_problems_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010188.bin
58033355f1a0fc91d57b5181757d65ae5ade1e7b9de9c5b4153c2052ad68e1e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10188 4960 bytes
font_01_sfnt_off00011246.bin
8aaa99653f0ff026685c146cd29d4d0a360e05821145b92d188db613b1eee31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 11164 bytes
font_02_sfnt_off000137ef.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137EF 4324 bytes

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