Malicious PDF — malware analysis report

Static analysis result for SHA-256 9084b27447a5f551…

MALICIOUS

PDF

76.7 KB Created: 2021-03-02 16:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 63af132da1dc064b150340a273604144 SHA-1: 89671eeae5df55f6e8d0c48ff93a71681d479634 SHA-256: 9084b27447a5f551eb6b335d420a5e82dcc1febc9455a3e8f600f35c85fdc335
104 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, specifically flagged as a phishing trojan. The document body and extracted URLs suggest a lure related to downloading a specific PDF book, likely a phishing or scam tactic. Although no scripts were directly extracted, the PDF format can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fokemale.ru/wix?keyword=flashback+a+brief+history+of+film+6th+edition+pdf+free PDF link annotation
    • http://easterthjg.com/rhetorical_precis_example2fc72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_600a1a87baa98.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/hjpWZhe/bovirebu.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/hbifjaB/playground_near_me_open_now.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/ckuad2s/34856254834.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/gdjbMie/rider_definition_government_example.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/ighjfhc/best_buy_ps5_restock_time.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/Yjj5hcO/helicopter_game_sega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_6029ee7e36222.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/dggEjg6/xilevimunojebegibet.pdfIn PDF document text
    • http://slimerecipe.org/83383951999vgf1u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_602a333b53c56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403557/normal_5feedaed33224.pdfIn PDF document text
    • http://moreprodukti.com/60632258993ewti4.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/juvuraguvutoxif/53553574558.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/greensburg_pa_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/114653921.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_off0000e145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE145 5600 bytes
SHA-256: 16aa9e2e50124cf17683998b07a1fc4c59e629d1c5e62cfdd54ef141642dbd2e
font_01_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 10288 bytes
SHA-256: d0d0ad48a44f5c3d65817789ba1d4c6e649d57594a07cc06389f9e1b229fb919
font_02_sfnt_off0001175b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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