Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3445da5c8b3404…

MALICIOUS

PDF

65.5 KB Created: 2020-12-31 09:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 35cb6625ff27ba0075d00c15bbe96215 SHA-1: ad350f5bf3743b7a5b66c64a91c82f16893b04fb SHA-256: dd3445da5c8b340431aef32588f5dfe14fd9c0839ed215a62460686b3a91a42a
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 URL that, when visited, likely leads to a malicious site. The document body, though heavily obfuscated, contains text related to 'ice hockey lessons melbourne' and the wkhtmltopdf application, suggesting a lure to trick users into clicking the malicious link.

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://traffnew.ru/wb?keyword=ice%20hockey%20lessons%20melbourne PDF link annotation
    • https://zizukomeluze.weebly.com/uploads/1/3/4/5/134582384/romaxideto_bidilef_xixoxonasilir_xevetoputekute.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/hjbgdjh/daludekosigimugegex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447107/normal_5fd7346eb5871.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/xukutabixisuriw.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/1464509.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/genukopapovixo/63756016117.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/mafoboforikarewidafukade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e8e834-8d57-4b6e-9c55-20815ff40e68/rodrigue_et_chimene.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/abc_print_out_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9bfda5-2cfc-4916-bc4d-c9de394d1543/jtx_tri_fit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b148b9-7f8a-4b5b-a6f2-157293e241ce/tennis_legends_2016_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/foxtel_tv_guide_world_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d977ff6-2cae-4eff-8d85-638caea4d4bb/84241703104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8e4f92-2cc0-4abc-92b8-19bdab9347c4/56788801960.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_off0000c3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 5072 bytes
SHA-256: 51de7076c24444cb1de20ab00d3e9c242286205cd825c607438ad7f6df749dd5
font_01_sfnt_off0000d510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD510 10648 bytes
SHA-256: 100f2ef121be9a7d4e5bc3cb3c6bad6174804b039e6f360579872e9572f1a8b9

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