Malicious PDF — malware analysis report

Static analysis result for SHA-256 78eb2ace0524fab4…

MALICIOUS

PDF

64.1 KB Created: 2020-12-29 21:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ed2e6664f88410e71b4caf71cfe9cb25 SHA-1: e0fc8d87870b5c87ee5540c7c968ba9777ff6b9c SHA-256: 78eb2ace0524fab42d4a683f4bd47d556db46cc7add4ad4f695bf0094f04c808
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm and redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to malicious content.

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/strik?utm_term=comics+elite+coupon+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_5fb93119c55fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f9ea92e1a73c.pdfIn PDF document text
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/3010568.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/f49c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f9a84eb387c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470961/normal_5fe3df611bb30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f93b381ec792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5fe672379d0a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f894a73795f9.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/xenavuxa/sip_of_health_eso_ingredients.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9ed081-9c31-4142-a2c5-04f846c0651d/34570702573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6235e4c-400f-4acf-80b2-36e655a12ddd/86269441738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23118c48-7e1c-42c3-b4c0-4d817e5c19a9/dream_decor_west_springfield.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00478775-cd67-428f-9177-d2006b8eeea2/2015_college_football_championship_finals.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_off0000c047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC047 4816 bytes
SHA-256: dc5880a7204f2bec5a97b38a662ab2ebb5ad4d7e28c45515d467db0eb323d1c8
font_01_sfnt_off0000d097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD097 10276 bytes
SHA-256: 5fc7242ecc3999abb6901ddd69c5da1bf58d476068a6f6599610d4a1ec50f313

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