Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c183cb8cb839e7c…

MALICIOUS

PDF

68.7 KB Created: 2020-11-24 01:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 807a988b2f0d87fe34276f9c71340a9c SHA-1: d81b8622e9920816ad2cbefc608237a53cb8530f SHA-256: 7c183cb8cb839e7c613d264f772d57e9e4045396c6ffa02b0f89e8d5cec1af78
164 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/strik?utm_term=how+to+download+worlds+on+terraria PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5fbc1ee783164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8e782c6e4de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5fb66c1f56dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5fad824cad456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f88a4833425d.pdfIn PDF document text
    • https://jupelokuxaw.weebly.com/uploads/1/3/4/6/134601506/wopisuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5f928129217d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_5f989f0311d85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f9a5dad3164a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f8dfa883dc83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/39791863061.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/affordable_housing_policy.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_off0000cc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC44 4872 bytes
SHA-256: 7300677ccd7e89e8b55634ba462774bae795405776c1537618213d3210de2d5e
font_01_sfnt_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 12840 bytes
SHA-256: 6587828d12a107164dfbd29115ec9ecaa00f0664a06796f2f732b45f5f1bbb79

Open this report in the interactive analyzer, or submit your own file for analysis.