Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad296af46b983cb0…

MALICIOUS

PDF

70.6 KB Created: 2021-03-02 13:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6d2826db3bc5f50b3b5693d4b301e937 SHA-1: ed2566e303b68664156fff2d84a3287276521951 SHA-256: ad296af46b983cb08fc018492f34afb7abd0bcd90b78d470ede86e31f1812e90
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. It contains an embedded URL pointing to 'nipisod.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'conditional statements worksheets'.

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://nipisod.ru/award?keyword=conditional+statements+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418762/normal_60067c701867d.pdfIn PDF document text
    • http://pezidibega.iblogger.org/bacteria_dichotomous_key_worksheet.pdfIn PDF document text
    • http://suxiselukex.66ghz.com/action_games_free_apkpure.pdfIn PDF document text
    • http://visezuxopusifik.iblogger.org/pibirubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_60313670b492b.pdfIn PDF document text
    • http://golixudib.mypressonline.com/how_to_change_battery_in_honeywell_doorbell.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/who_is_the_father_of_western_civilization.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/definicin_de_marxista_de_modo_de_produccin_capitalista.pdfIn PDF document text
    • http://fibewoz.22web.org/vusosonovuxevevobewure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipelizirivalul.epizy.com/65900993358.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/1992404793.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/26904880442.pdfIn PDF document text
    • http://lipesomidu.epizy.com/55782432047.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/43418284319.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/49255830425.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/silizezib.pdfIn PDF document text
    • http://gokozir.rf.gd/xubesavogexamaweletejatu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/54259075176.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/78517480444.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_off0000d7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 5128 bytes
SHA-256: 542941c4126851a90f52d0660362191c51d6b6826c1644d48fca9758852fb909
font_01_sfnt_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 10608 bytes
SHA-256: e46c7d2589f2bd7794d6daeb92f4daed6a1ca7d83e7817f6db225327af044052

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