Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e5b7ce2d23287c…

MALICIOUS

PDF

69.5 KB Created: 2021-03-25 13:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e375c98989a6608785b48c2f5e37c715 SHA-1: 237de01f88dc9e00914a615235285a9d78bb180a SHA-256: 59e5b7ce2d23287c96bc163858f91c9a469923edcb5b47d992f02897f78bf04e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for academic content, likely to trick users into clicking it. ClamAV detection and ML classification strongly indicate malicious intent, specifically a phishing or trojan payload delivery. No scripts were extracted, but the presence of an external URI is a strong indicator of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=rational+choice+theory+lina+eriksson+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365600/normal_60379c8139b1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465263/normal_5fc9d98b64d74.pdfIn PDF document text
    • http://naturwow.space/toy_carnival_frenzybone_quest_ragnarok_mobilewmq3l.pdfIn PDF document text
    • http://elerctum.org/a_prayer_for_owen_meany_book_cover79tmv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60271009c2ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476943/normal_605061ef60adf.pdfIn PDF document text
    • http://bit-ipo.ru/how_often_should_i_clean_my_masterbuilt_electric_smokerrl1fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_602af03a7263f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_603d519c3599c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420448/normal_5fec4261140ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393631/normal_6009879c7d6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_600471572dac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5fdc3a7c8f79e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/20104762682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807d76b5-7295-435f-979e-58b6ef729969/232027785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4918ba5-9246-4c2b-92df-58eb2f3ce2cc/what_are_viruses_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/kovirefap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec362d62-3021-493d-877f-d6ce93210928/54061889956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbf1844-4b47-4b22-94e2-aac6d522a3a6/xelunuwekikudefalafulor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5785c60d-62b0-477f-87b3-088731ac13ea/what_is_cognitive_theories_of_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/13089580289.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_off0000d057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD057 5416 bytes
SHA-256: eff8d83e91f8be08e009dcb8c835d46be9a4cfdb100a3963891089b2763bf1b1
font_01_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 10704 bytes
SHA-256: 21206e2e3de2eeb25e217875af3819c078cc06cc859e263a116ec752dbd2444c

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