Malicious PDF — malware analysis report

Static analysis result for SHA-256 683565d286bcfadb…

MALICIOUS

PDF

83.3 KB Created: 2020-12-18 11:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bbe1bcc94453634eb53b8cc25be4e9c6 SHA-1: 9c0a2720b4af8182ef3ee9733595f3246c9d8464 SHA-256: 683565d286bcfadb61f86a0b4d3d314f8caf5addefc744ab391cb475721997a7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=minions+spanish+happy+birthday In PDF document text
    • https://static.s123-cdn-static.com/uploads/4503533/normal_5fc55739abc00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472766/normal_5faa46f154af6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdc79b839866a15ab3def02/t/5fdc7b6e86e83642140fdffd/1608285038605/tratados_internacionales_de_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fd70e3-50ed-4913-875b-e93721ca4d7d/32093529569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747bc97b-dcc3-4c0a-b4e1-b349e2e1c076/grandma_got_run_over_by_a_reindeer_flute_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd035e8cb11b25c09cd9c3/1606222687465/pacing_guide_template_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a803586e-780f-41c2-b99c-c5ae61a4606d/57485609719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da35e62-ed46-4616-ba1b-12ca0e26a12f/liradoludexigirabekew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bfd10bc-530a-4319-a31d-ec15efe73ff9/90572164179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86335749-b357-4823-acdf-45270d701dee/kelley_mooney_hallelujah_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05a570f-b12c-414f-ab31-a721ee08e0ca/kim_flowers_alien_resurrection.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/pazubuwukebuxar.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/audit_report_of_infosys_2014-_15.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_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 5264 bytes
SHA-256: c30a8735cf9b3dd05571c6880ff9dbc997eab50e94874e3946f20e28555a2efb
font_01_sfnt_off000119b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 12224 bytes
SHA-256: cef8f176eb35c7eabe0bea53c1930589514e5671edb68bf6289be7bb68d5ceba

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