Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53bd1f6fbf09482…

MALICIOUS

PDF

74.8 KB Created: 2020-12-20 15:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 86e7b343f63e81fc66f18eb818b33aff SHA-1: 4b8fc79d80d95389e2421cdfd93ed508c4139256 SHA-256: e53bd1f6fbf09482f287ec349ac6527fd88f06fb52fca9d3dcfd0a9d3184f8d8
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://traffking.ru/123?utm_term=vanu+sovereignty+ranks PDF link annotation
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/tokigotagi-mamijirubijeliw-sitep.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/4b83a68b08c8.pdfIn PDF document text
    • https://bisudika.weebly.com/uploads/1/3/4/3/134366448/2309c644.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/5476235.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/rodiligarexo/c_ops_mod_apk_obb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27b67c14dfd36fefb9266/t/5fccbbab33187724c4ee7d1e/1607252908962/vatovaliwebagotis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617aaf24-4462-446f-8a03-376ef7672a72/google_sites_77.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc779c3aa0dc1643a319e47/t/5fd5f20cde5b1220c01f8bc1/1607856653037/98741072227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a105e73e-70af-4f3d-8516-72cfd4c82f2b/79783427323.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6de87579eee3ae06a2129/t/5fcad909a3bc3d19152206fe/1607129357064/game_programming_in_c_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a79ef9866f3fd2f451a6/t/5fd1b6ef8185f4776a0c6057/1607579378528/cheapest_international_calls_from_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/minecraft_skywars_server_ip_address.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115d62bbd7406580792b0/t/5fc47d123c6ccf69f3eedec7/1606712596564/punotesuvaxubitulikuvum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2f2dbc819f1cf4a2d72d/1606299437601/11009118074.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54698085bf90c0e1a01e1/t/5fceefc47c36362741a2e26b/1607397317583/70533927219.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_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 4896 bytes
SHA-256: 22f52551315c57c53d7444a14df5e24e3d44f8d21901ec82fe85ca7fe1c41737
font_01_sfnt_off0000ed04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED04 10340 bytes
SHA-256: 65fb040b7a30979820c0d1a0cfa7ae3bf6439be8efce4ad23ea128a9fee7f241
font_02_sfnt_off00011056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11056 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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