Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdfe5c0d1143c26…

MALICIOUS

PDF

70.9 KB Created: 2021-06-08 17:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: df3c22b6cfe8b2ecfdf9175f68811067 SHA-1: 0a5f411c3719efd2b1564989923218a54a9bd755 SHA-256: 2fdfe5c0d1143c26bfd11a8ea156cd115a4bb660351860058ebd5e2a2ff41303
116 Risk Score

Malware Insights

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

The PDF file contains a malformed stream and an embedded URL pointing to a suspicious domain, indicating a phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The document body, though heavily obfuscated, suggests a lure related to a 'Town hall 7 war base copy link'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://chcial.ru/pbw?utm_term=town+hall+7+war+base+copy+link PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421200/normal_5ff1e00444bb2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4454803/normal_60b41b1a61a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_600cd18c92292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_60476b1c7cc74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_604d25a027a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459939/normal_60490a7522fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_602ac583028cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_606e2d22c2e59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ffc667490109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506131/normal_5fe27891868ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_5fe706062835b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_5fdc12b0a2e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_605b52e173a7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5ffbca26a9957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_605d75e9eeca6.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://uploads.strikinglycdn.com/files/232d2ad4-a3df-4b73-9612-d20fd10302ca/kenmore_elite_convection_oven_repair.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/manual_de_cerimnia_de_casamento_evanglico.pdfIn PDF document text
    • http://lojefizowoj.pbworks.com/f/44704174733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f38d279-723b-4045-993a-6b44f299e9f2/rirugafobisevenedola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43fe97e-0ff0-4c9b-820e-5d5837257aec/58984941617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df06618-cbf8-4981-b835-1d0c88dfc329/98626866353.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_off0000cbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAC 5156 bytes
SHA-256: 38e4b07ae281444e49add034481250030c4aab67d2129a16424d29fe9b025e52
font_01_sfnt_off0000dd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD36 10344 bytes
SHA-256: ad8f1204ccf1da69e5dbd7b4dadc62a63bd3e6b09ae0fbf962eed58d23c61a2c
font_02_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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