Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a8e7f3cc193542…

MALICIOUS

PDF

75.9 KB Created: 2021-02-05 02:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ceae934e019260438e7bbd69ff2642a5 SHA-1: de83a4aec59e10e46534381636e8dd56b90caa7c SHA-256: 76a8e7f3cc1935426baa91dc9d87339db961c4e6eefc93de66d6150f1bcb91e4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jottigo.ru/123?utm_term=best+mp3+player+2015', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

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://jottigo.ru/123?utm_term=best+mp3+player+2015 PDF link annotation
    • http://chelobaka.space/haccp_plans_are_required_for_which_of_the_followingc2rg3.pdfIn PDF document text
    • http://linza.media/zuteziligonubopigewoxowuaxwjs.pdfIn PDF document text
    • http://verification-help.com/hematology_exam_questions084jf.pdfIn PDF document text
    • http://cartest.pro/liparatemesojumagiju34j1m.pdfIn PDF document text
    • http://dokojusekorukuf.iblogger.org/topigi.pdfIn PDF document text
    • http://avto-trokot.xyz/ryobi_pressure_washer_manual_2300zgb62.pdfIn PDF document text
    • http://2022god.com/lovanokuvww4.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/kozibowisenatu/developer_edition_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/42513204283.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/brother_sewing_machine_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/gapulubokerotudotive.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/sni_bioplastik.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/game_battlefield_4_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/the_git_up_dance_step_sheet.pdfIn PDF document text
    • http://divifafapinuk.rf.gd/jelupovebubasanuxujedir.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/xafoxu.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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 5732 bytes
SHA-256: 6209a70643a8596d48b9f2dd9b1670c2c54b71c479134c3870baddb32295bf4a
font_01_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 10872 bytes
SHA-256: aa6f264604fe9d718e40c411d1255896798f7334a3c25d84f7c2529c7b59b8b3

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