Malicious PDF — malware analysis report

Static analysis result for SHA-256 52de5d61420c0ae4…

MALICIOUS

PDF

69.0 KB Created: 2020-12-11 08:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9450c0d6a26f6be8c17ad59bef0d3f44 SHA-1: 96ac85f5972698d9f9bdefb9c83de84a1041ac2f SHA-256: 52de5d61420c0ae44ce595f67f598bed2dd971fb014f193d5e8a8ebdaa9a4bb9
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=car+amplifier+repair+houston+tx PDF link annotation
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/4fa8bfd.pdfIn PDF document text
    • https://voduzivet.weebly.com/uploads/1/3/1/6/131607522/82696e9.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/2811597.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/4533835.pdfIn PDF document text
    • https://tetumuvagawemol.weebly.com/uploads/1/3/4/5/134522004/a69d7c0047f960.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/4044357.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/duwizom.pdfIn PDF document text
    • https://zoladikadaxupaj.weebly.com/uploads/1/3/4/6/134635808/75b1e5cb49951d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fd107516299d.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/zakutax-zapokazoren-gavabomad.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/5fbce344be7cfc36344e8aaf/t/5fbcfa6ab4c4d833b8bd8666/1606220398407/c_words_to_describe_someone_positively.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc571e9abaecd331840d47e/t/5fd22b05ce71ee580fb45102/1607609093597/49648840017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc106d1bf71053ccb10e0e5/t/5fcf3a8a14319a51dc2d25c5/1607416459521/gold_mountain_communications_salary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5386f3dfdd95b60f16c7a/t/5fcc6e0b33187724c4e9aa30/1607233041683/x-_plane_10_flight_simulator_download_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc362cf5687f52b6b9115bf/t/5fc5df567acac6192a8d69f8/1606803288207/kojenisonu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51b83c02f22b9d03ed89/1606373816778/whatsapp_plus_mod_apk_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc14e0a9d79364840bddfb2/1606503947161/99707096726.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_off0000cde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE6 5116 bytes
SHA-256: fae824d343d996b7d16e663b0bc88373ad058e79975c4d098261523efcf85ce2
font_01_sfnt_off0000df21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 11364 bytes
SHA-256: b4d0c8096a1c5886ad1bf17c6aaa96235f367b2fbfb3564eec7b8f97cec2d4d3

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