Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf5e7a31ce980dec…

MALICIOUS

PDF

96.8 KB Created: 2020-11-29 13:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fbfc98a8b39533f4e52a4c6d74e179d5 SHA-1: d549c2725a45fa55ccd16b88f1ebdee4677f177f SHA-256: bf5e7a31ce980dec1587d4e82a3fafda3864d833c1eb56bc9d99465e4aa7b9aa
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 0.9998

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
  • 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://gettraff.ru/strik?utm_term=spectrum+tv+guide+bradenton+fl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5f94764ca1ef9.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/de10d4429b7286c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5f99e6247206c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_5f9bb6e15a00f.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/lajelimubadezeraju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_5fbdcdc0a7062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f9458f4dc53d.pdfIn PDF document text
    • https://roxejane.weebly.com/uploads/1/3/4/4/134486752/dejoligaxuwizoj.pdfIn PDF document text
    • https://gefedotozowane.weebly.com/uploads/1/3/4/3/134395864/a9b93b2c41c.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/jinipefan-riporiki-muwatudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8d88308357e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_5fb41221764be.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://uploads.strikinglycdn.com/files/610112d2-8565-4121-b337-6a67ac260050/22336830651.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_off00012e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 5484 bytes
SHA-256: 25d57871b56fb0c0d06a7bfc7849d80f1bafa9c45f18782a620a93ac308fe217
font_01_sfnt_off000140a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A2 11968 bytes
SHA-256: 7116b4b029cb97928c0b7bcb621a4658d931865f439b83da38955e6d52c2305f
font_02_sfnt_off000167f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167F8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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