Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bab0c751f58d56…

MALICIOUS

PDF

68.4 KB Created: 2020-12-18 11:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 694d7852102ce3b89ce24b1a36803523 SHA-1: 15c422208c4ceed92f3efc6c4a5362a9464d5b99 SHA-256: e4bab0c751f58d566554f8485d271928861bffca9fa024dc012bf246e89e07da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one identified as a potential SEO link farm. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to redirect users to potentially harmful websites or engage in phishing activities.

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
  • 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.
  • 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://traffset.ru/strik?utm_term=walgreens+ankle+support+socks PDF link annotation
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/852608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_5fc0e6493dbf2.pdfIn PDF document text
    • https://vesemidibokopiz.weebly.com/uploads/1/3/4/8/134869856/butojanebug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5fb297a11c06f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8bc22bbdfaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5fcc137d74b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_5f98a1e793fdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486037/normal_5fc4f9f739ab5.pdfIn PDF document text
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/4778083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8b6cac1c23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8ccd3a26381.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://static1.squarespace.com/static/5fc1823aea4a794d564964e6/t/5fcceb49920f47545b948db9/1607265098342/reapers_revenge_tickets_groupon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11d1c2bbd74065807c487/t/5fc997606a94db17e48a5e15/1607047009171/45028552985.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_off0000c32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32F 5012 bytes
SHA-256: 415752d52ee46ff20aae67c76e7e24d355e2a05fdc0a2bb493abce5b6893e6fb
font_01_sfnt_off0000d45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 10080 bytes
SHA-256: e517f8a7d3de3f5249932314f61039b07a9c8fdb29dd6c2b6eccdec8f4a617d6
font_02_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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