Malicious PDF — malware analysis report

Static analysis result for SHA-256 09431b1b31bc5e3a…

MALICIOUS

PDF

72.0 KB Created: 2020-12-23 02:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c1828d520cd59efd0f0e2f3636842d52 SHA-1: 929be09c1cad32cbf794f9ebcc4b431ae439965a SHA-256: 09431b1b31bc5e3ac6d0dfd59c14132a0b130073d6e5c78c6e244f2279373eef
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/strik?utm_term=starfleet+commander+extreme+uni+5, is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, characteristic of phishing or malware delivery.

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://gettraff.ru/strik?utm_term=starfleet+commander+extreme+uni+5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489409/normal_5fc362b12cf0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446162/normal_5fe28a8595f67.pdfIn PDF document text
    • https://musufofijadora.weebly.com/uploads/1/3/4/8/134888277/desijilow_fuzugetibaveso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fced17255c0d.pdfIn PDF document text
    • https://zeronifoza.weebly.com/uploads/1/3/4/3/134312515/nozojowifanup-jolagefuteda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_5fb69941ab4bf.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/tuxutedi/bell_s_palsy_facial_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/pronunciation_guide_to_learn_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/kavapimamunilurop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9da7ff99f865bfec24a0/t/5fdcc8515a5f2646af9f689e/1608304723704/up_vdo_answer_key_sarkari_result.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d509de11a3bcb749b5f/t/5fdc93b430812c639f11081c/1608291252945/miniclip_games_for_pc_bubble_trouble.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c5fa405d5340f34b1f29/t/5fd68bcb226e9048fabd22d1/1607896011839/waketodosavun.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/pulupomovewokosavolave.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/64415377434.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e541403f5353fda2cdb2/t/5fc63e447acac6192a969d8e/1606827602954/dulixeroxuzetuzo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7a3b0a190b16b315946c/t/5fdca2eecc15f94223402637/1608295151232/sepofoxenilo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe02396d610986319788707/t/5fe0b78aef735726d2933190/1608562571623/bautismo_en_el_espiritu_santo.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_off0000dc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC91 5284 bytes
SHA-256: 0c58fd3c921eb7385c73a1e8dae4247fb55daa9128aa2b9292d13e9b7fe93a82
font_01_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 10776 bytes
SHA-256: 50f90d5402cc369b33f549ef87825bad755799cf072d7a4cfa2420a79fe145eb

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