Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bc92d6f10a2a4b…

MALICIOUS

PDF

78.4 KB Created: 2020-12-17 06:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dda006dfe014991df27f6772c2723412 SHA-1: 9dc3ba932718c8e2ac4cf47154d45d96fba9bea1 SHA-256: b2bc92d6f10a2a4b74398d416a50fa726bd52d5f84d2dcfaa5c170a74542b30a
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-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.
  • 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=naruto+minecraft+mod+commands In PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/a219c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5fcf1d624e072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368989/normal_5fca4c2d30638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5fc473793672e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374188/normal_5fce8ac6c556d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f89f215d9c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5f98311ba0e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446923/normal_5f9f869e51c1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8d81e07ae74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fc9a5243f1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5fadabeb91b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491398/normal_5fbd0e271b601.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/5fce8e17059efa4cc139f371/t/5fd6b50fde5b1220c037c289/1607906582826/39632834386.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_off0000e247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 4392 bytes
SHA-256: b11b3200de1fc3f805cb1e7d8a6b073c3a5b27c7134517a50e8eb6f34c893521
font_01_sfnt_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 5104 bytes
SHA-256: f8893d21298c4a492a0e751e102407e9e35233029bb474d75c36afba2b748099
font_02_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 12152 bytes
SHA-256: dbfd3796048ff91fc014f158ad4bf9adf1717b05be90364458d93cdd2895b776

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