Malicious PDF — malware analysis report

Static analysis result for SHA-256 47148a167cf75cd7…

MALICIOUS

PDF

69.5 KB Created: 2020-11-26 18:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2c2e9fcc0663e1b08cd5730d71c4392b SHA-1: e8c6dde63482be5354775097bd9ccce05effb291 SHA-256: 47148a167cf75cd7d6a4d2a74c509a38a77db016ce71a919f5c0250d4ada2d73
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to malicious infrastructure and potentially exploit vulnerabilities. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

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=dropbox+professional+file+size+limit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f9dda028256a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_5f9f84cf941bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_5fb39a8747b5a.pdfIn PDF document text
    • https://dekewixamime.weebly.com/uploads/1/3/4/5/134516443/9112202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_5f9999112fe26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90daf177-c265-4bd0-8ae5-9c494960f012/unblocked_games_66_minecraft_tower_defense.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ce1646-32f9-41b7-8318-568c2c9a88fe/circle_of_the_shepherd_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/astaxantina_antioxidante.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56086318-5838-4b58-92c0-a5128f98e2d4/99061414228.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/78946903453.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/construction_risk_assessment_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/platform_economy_history.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_off0000d2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BC 5304 bytes
SHA-256: c32ffa25101d0d454ec5cb826aaa64eb777cae05bfd53904b0e277b4a934c9b9
font_01_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 10704 bytes
SHA-256: 4bcec1c18826a5799b271bc3cf3ea357b0cf56fd800190dd593b270a71e5f5ec

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