Malicious PDF — malware analysis report

Static analysis result for SHA-256 617ce68124e430eb…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 23:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1aebcebc6fd00ce4e5876a32d9fa84e5 SHA-1: bff61e1e175a8899ef55c7baed6aa27558bf41dc SHA-256: 617ce68124e430eb225c311a86767e750e154f954cd63d4cd2738b60a542bb26
104 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an embedded URL pointing to 'kuzutuzo.ru' and a heuristic indicating a visual download button strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=streamsforus+new+apk PDF link annotation
    • http://esmoney.site/48956097857nbody.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/hfDidY4/.pdfIn PDF document text
    • https://dinurafilaxu.weebly.com/uploads/1/3/4/6/134621410/gipizezen.pdfIn PDF document text
    • https://kotazadan.weebly.com/uploads/1/3/4/3/134349323/3037553.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/ghjbicH/animated_movies_dual_audio_free_300mb.pdfIn PDF document text
    • http://lojasamericanasbr.com/how_many_carbs_are_in_a_chicken_chalupat6h32.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ie0jeij/biaya_beli_pulsa_lewat_m_banking_bca.pdfIn PDF document text
    • http://4338bacchus.com/how_to_charge_a_g_shock_solar_watchiuonf.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/64199354283.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/presto_85485_pressure_canner_regulator_kit.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/96926731708.pdfIn PDF document text
    • http://ig-copyrightnotice.com/44942909002pglwa.pdfIn PDF document text
    • http://delayikapy.xyz/13704876548kmds7.pdfIn PDF document text
    • https://cdn.sqhk.co/sozivowemin/twVjarA/my_little_pony_story_creator_mod.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/5359436.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/rurovikejigibu/comreg_quarterly_report_q1_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/tumi_amar_chiro_sathi_bengali_song.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/autocad_lt_2014_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/94090537481.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_08e94ab83ef248ec85391ddd2ac165a1.pdf?index=trueIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_c669dc87899c4354ac33b3db8de7903c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofiguj/is_the_fe_exam_difficult.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_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 5276 bytes
SHA-256: 53086d543d263ffbddf20b9abcb7bfac4aad2a4145521cd2630e152867edbb3a
font_01_sfnt_off00010449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 12712 bytes
SHA-256: e84a0c91c7f871aedf60546d00f5141754fdb66bd9b6319ad5ca895c8b460abd

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