Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac9c6686ab37d47…

MALICIOUS

PDF

67.4 KB Created: 2020-12-17 21:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f9546f63d144322e9209bf6041a243cb SHA-1: 5032bb89c04f7cf06b1fb687c75ac7fcaf570c1d SHA-256: fac9c6686ab37d478076a5d206e524a1abea04dcd736decc25b60d6724c10694
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://trafftec.ru/aws?utm_term=formasi+cpns+papua+barat+2018 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/burns_and_sons_trucking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b356ce62-9d17-4275-9fdf-55cd925bf0e8/dafikoxuzob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30874df132613bbcb9d36/t/5fc542ad4e98326c02bddada/1606763183297/eagle_pass_high_school_yearbooks.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc798530791337046ea0c0f/1606916180245/jasuguvapenanevovivonex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd10a99eac5d50e5679d12/1606226089599/circuit_builder-voltage_drops_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc009dd8787e87989674e7e/t/5fc2ebf03c02f22b9d6db257/1606609904484/17749315927.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cbc6bdb33045eedb2023/t/5fceb32ae985de2631ffc99f/1607381804321/nijinokuluwudu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57fa7f7cf8c754049e1b2/t/5fcc496fc00f007ceadcc95a/1607223664755/summoners_war_street_fighter_skills.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b50cd743eb43444af1c9/t/5fd0150406d21916ed5fa368/1607472389246/zubizusafofebixemaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf08df3de5e49b5294897/1606283405687/gulf_of_riga_ck2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fd1b0edb1f69267715584c7/1607577838879/dovuwomu.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_off0000c9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D8 5660 bytes
SHA-256: 50ad8a8610663751813a8d7421cc1aa6c68ee2a52fa832a1fa39ea8131a9942d
font_01_sfnt_off0000dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 10520 bytes
SHA-256: c72ec4bd29d441cacaeb29020c7da68fe6208e823963c7810ad9f2b908bfe1ef

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