Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e79833c51c84bc…

MALICIOUS

PDF

83.3 KB Created: 2021-01-16 10:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7fa8f5f09e6b733afa8cebb2c0cee3b7 SHA-1: 7b05de8f1a314053bc5a10b80e2aa15bda59f933 SHA-256: a3e79833c51c84bc49c498e163bca82e0d00db059cfac20af268ed7ba792983f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a phishing domain, disguised as badminton rules. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site or download further payloads. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=badminton+2+player+rules PDF link annotation
    • https://cdn.sqhk.co/lojumisebu/diijbhf/dragon_wallpaper_hd_1080p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5fc25b35e3eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446917/normal_5fa865c4a582f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f96e3190e499.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/uR9jjjb/donde_pasa_el_tropico_de_cancer_en_mexico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460230/normal_5ffaa97da38ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fb9132cb62e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fbee69d7ce3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_5fa169135a487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_5fd2d97f9e751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5fbb3f3804a94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379968/normal_60023b79008ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5fb88d9d978ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/paxunu/fizolegowonewisodu.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/52760585471.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 5272 bytes
SHA-256: 8df887ce03cbbe64778273ae794f1c796c8aa64b214cdc47a2c0d6917a7dab9e
font_01_sfnt_off00010e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E25 10520 bytes
SHA-256: 33fc9f637c825fa0081bd5a966a4472644afc7b2f384bf0577814d19b993d400
font_02_sfnt_off000131e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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