Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c0b81a98471a4b…

MALICIOUS

PDF

72.7 KB Created: 2021-03-18 12:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ca7207c4288aad6a817bbe7037cb44cc SHA-1: 93a3def4183ff713ab61a4e0a4d0d12a8a16e4b9 SHA-256: 99c0b81a98471a4b87d37da266118de420a2db2a8a2378a98981c3b74fce18df
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to a game, likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing 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://golowaki.ru/wix?keyword=escape+the+prison+game PDF link annotation
    • https://cdn.sqhk.co/fugolamudara/EGijidT/10th_std_maths_digest_maharashtra_board.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/Kcicig9/migir.pdfIn PDF document text
    • http://momsmall.space/40595057703co4p5.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/xehcjgW/firapapovukuturezit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_604cc68d81b30.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/gqhfhbz/8879358176.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/hdZ1Sjc/wujipor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_6013cb7e3a12e.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/cgdQjbN/kasozarixe.pdfIn PDF document text
    • http://yandex-delivery.cc/anjali_anjali_lyricsc1onh.pdfIn PDF document text
    • http://winoorama.space/xoduwuxupudwrr7i.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/2cQ11YH/rankin_bass_christmas_movies_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/iiid3pt/jekiwowodajobitaxumuz.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/3223dee4-2cf1-4094-8d5f-3d210988711c/nombres_y_titulos_de_jesus_en_el_antiguo_testamento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65d513c-ee69-4d01-bac6-21c6bc1df252/xaguwazugedemugepagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6afd821c-408a-4ff9-bdd4-0f3a11accfe1/60039112944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3e976b-ec93-48da-8287-cfd855b653e9/44784807247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210b44d8-163d-4de0-9bda-bdf73ca89766/skilsaw_model_5275_blade_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb420de-034c-45e0-bf23-49a7429acd7d/temukekikasisitogovesetov.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_off0000cfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAB 5060 bytes
SHA-256: 057152e8171fa85dcab32f08c71b08f9154868e374ce18e0201e45fe1f4aec32
font_01_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 12468 bytes
SHA-256: 95f57e23d64087481f72d9e66aedc79e5c465fcc52c51d4ce3171b65158a7ec9
font_02_sfnt_off000107d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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