Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8616dd211d42bfd…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 18:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 20c52ee663d8cfa16738a4ad9e7a718a SHA-1: 69e731634b70b15bd97b9e37e0f71be0a182d3b1 SHA-256: b8616dd211d42bfdfeb3110d17c938bef949e4a01a6e1714937a1cafdbe00441
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though partially corrupted, suggests a lure related to a class president speech.

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://leonvi.ru/123?utm_term=ideas+to+include+in+a+class+president+speech PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5fca6e42246b8.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/chhfibP/fine_cut_for_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_60240ce38e254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_6017333cc3131.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jcLifk7/fox_sport_monterrey_vs_liverpool_en_vivo.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/irn4shg/arcane_quest_hd_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/hql87ic/kivedusevov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_60053b3d22097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_5fdc302b9d108.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/dafumuxitupav/sitogarukumemipowopepusu.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/al_quran_translation_in_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/financial_reporting_acca_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/1669593517.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/tibozezigesor.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/wiwibejuwedoxabidav.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/lazituxutori.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/4510550497.pdfIn PDF document text
    • http://mifumupesa.rf.gd/83259995637.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/wizowenijewisatesowo.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_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 5100 bytes
SHA-256: b7b99556ae5c336c591af1222e1a318a87557c61c71f6503a4b2fcfa30e5b6aa
font_01_sfnt_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 10712 bytes
SHA-256: 87a869385449d74a437f3eff09222b233b0087e6d67f7503d3d6304fc48698dd

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