Malicious PDF — malware analysis report

Static analysis result for SHA-256 375e769076b35a85…

MALICIOUS

PDF

77.3 KB Created: 2021-02-12 04:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e58151e1fb7442edcec0f7bb98358ae1 SHA-1: 1f468425da7b34e73ccb08a3c522aa14d8421168 SHA-256: 375e769076b35a85df324fcb754c26208f024477910a8cd8bdc0447e8e4b36fc
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 URI pointing to a suspicious domain, 'maypoin.ru', which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it was programmatically generated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=navajo+county+assessor+office+phone+number PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5ffe72d87464a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380088/normal_6002894ba42e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446638/normal_5ffcfa35981eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470016/normal_5ff8ae5f0966c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5ff0cfc92d8ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_600afdd921b9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5fe57ff081925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411483/normal_5fd093276c69b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419644/normal_5fceb4587f5e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450734/normal_5fe2fb73a8285.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/pukiza/kreg_kma2685_circular_saw_guide_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/25952511910.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/botulinum_toxin_in_aesthetic_medicine_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/fijibexi.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/2019_kannada_movies_in_jio_rockers.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/online_flyer_templates_free.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_off0000e35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 5452 bytes
SHA-256: fdce3dfa0e8bab13f419a75d2bdc5dadd952b7fb0b534003bd0387fbca038e0f
font_01_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 10552 bytes
SHA-256: de70a168ae12b923402f94baff6521aa5f5b85bc6ef50ff35088ec9abd326dd6
font_02_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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