Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49bbe2781ad1b86…

MALICIOUS

PDF

75.1 KB Created: 2021-02-25 10:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d34548f1136fdd1da72dd8ca56d594ac SHA-1: 7539cfa0d2a647260b72ffada4a54c411c2d3610 SHA-256: e49bbe2781ad1b860012f7177c5bddb622b1d16a9967241b7a768d3dd519abb7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, suggests a lure related to educational exercises.

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://seumenha.ru/aws?utm_term=synonyms+exercises+with+answers+for+grade+6 PDF link annotation
    • http://mosebuzixat.mywebcommunity.org/17092999286.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/iagiijg/pawenudimuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcad70290666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5fd69ae05449d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_6028f55953cef.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/the_real_christmas_book_c_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_5ffba3f842059.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/WfjbPhf/green_pepper_nutrition_data.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369495/normal_5ffd739a3e49a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_6016826f9e590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_6020c1d0cf094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd16e9248b5d.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/tisegovofu/printable_copperplate_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/cable_stayed_bridge.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/apoorvaragam_malayalam_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/fatejan.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/corazon_de_nino_partition_piano.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_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 5708 bytes
SHA-256: 2a27270b8793dbf81f05ca0c9ba477e3b1a80eeae07cc8a54464e095db537faf
font_01_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 10252 bytes
SHA-256: 2c92bfeb589e6b8c51a749f4a370068f93b5ff0e7856a4edb957864a30704b9e
font_02_sfnt_off000110d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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