Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7ec8e8ec60f72f…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 11:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 479a074cd9560ff1a73b13b3084b2686 SHA-1: c6c5d82bff1281369bd5d5eb113687fd1e31398f SHA-256: 7d7ec8e8ec60f72f77206cdbc0a2595a00f389e1c3c981fd76c9092a39e909e0
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to 'https://seumenha.ru/aws?utm_term=how+to+troubleshoot+ac+compressor', which is likely a phishing lure. The document body, though heavily obfuscated, appears to be related to troubleshooting, reinforcing the lure. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/aws?utm_term=how+to+troubleshoot+ac+compressor PDF link annotation
    • http://bavujiburivege.iblogger.org/41578694256.pdfIn PDF document text
    • http://legendnat.space/903346316641ihxt.pdfIn PDF document text
    • http://thelait.pro/dufobad4s5n.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/unanswered_questions_buddhism.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/riachiB/full_screen_sad_whatsapp_status_video_download_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/idlRNtl/37184771113.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/bxagjib/vilulavo.pdfIn PDF document text
    • https://cdn.sqhk.co/tedatekalo/jhhd4rf/pinball_games_for_sale_edmonton.pdfIn PDF document text
    • http://buytoday.cc/relion_bp300w_manualzpuvh.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/ejhcEgh/tank_block_blast_mod_apk_1._0._3.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/tizowodifi/wabizuma.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/7105535679.pdfIn PDF document text
    • http://gajedimigifupet.epizy.com/govefekobuvogemidudatis.pdfIn PDF document text
    • http://rokabimokow.rf.gd/dubagobinibimodipu.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/tisubivetekixigokawiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/xojopulofawima.pdfIn PDF document text
    • http://wurunuj.epizy.com/bhagavad_gita_in_marathi_file.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/dvd_charlie_brown_jr_skate_vibration.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/falciform_ligament_ultrasound_images.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/changing_degrees_to_radians_worksheet.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_off0000e1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EE 5368 bytes
SHA-256: db121aa2f730267946df79d53e248bf5295514945ae05577c05965e6b0e29130
font_01_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 10032 bytes
SHA-256: 0b22c945fc06ac40362732e69bf5ac50ed700d45ce3c31879273e3f5bdce83e6

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