Malicious PDF — malware analysis report

Static analysis result for SHA-256 d726ab7d33556dfd…

MALICIOUS

PDF

141.5 KB Created: 2021-02-10 12:57:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 67cd080977c66e733e618386b412cc5a SHA-1: 737c28ee25e210ee68ea8dd486148040ce1dd9b8 SHA-256: d726ab7d33556dfd474e533f3a73ee84eba6bb579e3b2f996c370c14b9f6f07c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to 'push and pull factors of the great migration worksheet answers', which is likely a pretext to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=push+and+pull+factors+of+the+great+migration+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6017a4241ac69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_5fc93b965401f.pdfIn PDF document text
    • http://zojulosopejozaz.iblogger.org/96061512548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386354/normal_5ff16f87238bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe16090b37d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fcbc7a077d06.pdfIn PDF document text
    • http://lovumodezubudem.iblogger.org/chori_chori_movie_video_song.pdfIn PDF document text
    • http://sparzha.club/netters_anatomy_coloring_book_answer_keyvgj5g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujazenemelix.epizy.com/gogo_sentai_boukenger_vs_super_sentai.pdfIn PDF document text
    • http://fapibudu.epizy.com/cisco_webex_teams_guide.pdfIn PDF document text
    • http://xazerusovugidu.epizy.com/ixl_algebra_1_x._5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/adobe_photoshop_cs6_tutorial_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/90849910418.pdfIn PDF document text
    • http://jakunivejejaxo.rf.gd/39314207176.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/51824794382.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_off0001ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE8C 5724 bytes
SHA-256: 2f7259e8f1add75a5a5ae6f59dcd53b6a5c7e424f19137193ab8541adf31c93f
font_01_sfnt_off000201f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201F4 11116 bytes
SHA-256: 8a1dabdbf1968fe600fca9d9042dd51c65d4ad254bfc3da5967f94d6f6923ef4

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