Malicious PDF — malware analysis report

Static analysis result for SHA-256 f561155b43788a63…

MALICIOUS

PDF

81.4 KB Created: 2020-12-20 15:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7e822357c18dfb28e5dfcdd172a70f35 SHA-1: 9c9dc573af1d10f1c8b65e157372b59c9dea3e19 SHA-256: f561155b43788a63e631ad52588b5aa85cc1edd18e6b068b1b841ce5f93c144e
214 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 and 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 0.9995

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
  • 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.
  • 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.
  • 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=lesson+4.1+angles+formed+by+intersecting+lines+reteach+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f9968f28321d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_5f967846b4459.pdfIn PDF document text
    • https://wefomupexe.weebly.com/uploads/1/3/4/4/134491092/7ee9aaefd96283.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/kopijegetutizub_wijafuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fbe70df74140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_5fc28d9dc5598.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://uploads.strikinglycdn.com/files/91a955bf-2dd9-4189-8d72-422a0e667ee2/teorias_del_comportamiento_del_consumidor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2108f10c-7155-469e-9b17-8a94ec348031/77883094342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26678c3a-10d7-4aed-ae18-e14595ab2a06/love_you_so_much_hillsong_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b654a919-b231-4753-bdd3-3bf21ee6a60d/70088413879.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/binary_search_on_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e319d550-ba70-4216-8be2-91b6c9a1145c/7476974687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9d9d2b-62ef-4578-93c0-cfba683e07fd/zisikupup.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/ccna_security_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 1728 bytes
SHA-256: d88c079cfc64f69e8d1daea5e5a04d918cf2ea71e8939e55eca56b37ef1b424e
font_01_sfnt_off0000da42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 5672 bytes
SHA-256: ddb0eac7378519bd3485ed607d46145bc6fd4cffa1a1802e2ae604bd7d83649b
font_02_sfnt_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 11132 bytes
SHA-256: e38f760a8714348dacbac15c86476f784b0cccf001ca3c346231207c6a425e0c
font_03_sfnt_off000113dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DD 16208 bytes
SHA-256: 1b0cb72d22602438b7e57101475c869d218db2c235f4f8c4774ab6617b658753
font_04_sfnt_off0001292c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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