Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ae9ec2c01fc8da…

MALICIOUS

PDF

68.2 KB Created: 2020-11-19 09:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7109fa4e962b659c27b97ad749fdc015 SHA-1: 2d1d395e1f316d83a2b6d336719417907bc023c4 SHA-256: 43ae9ec2c01fc8da47eea9811fb4c61acd9fd55eb26e796079bda1f9f1149cd4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are likely part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=breath+of+the+wild+lynel+location In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_5f9c81fa1dfd2.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/nufagozelumawar.pdfIn PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/rakimedilanurate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_5fa652f2e1907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5f9686b838ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_5fa753af174ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f99e5b53d1fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_5faf8be624a33.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/f6b92c49-2ce1-4dcc-a7f2-254f093bcad6/timozabinivaxivifuxuwiduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e846c41-6f5d-4024-8a5e-d29d47ddcae4/vazowaxurojoseravuxax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f359266-fa59-472c-a398-5730c68e36f2/xodojofepixiwubageluwufu.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/blank_dog_shirts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ebae7a-75ff-4ddd-a6ea-fadc38d73b74/patiguxewoxaboripisekum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49b4a80-10ad-41d1-90e1-3af255e223c8/dum_aloo_kashmiri_description.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_off0000ce97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE97 5172 bytes
SHA-256: 23a06a12d239409a52e92384e50eb9bb1055633f216c8b8318cc9012c85640dd
font_01_sfnt_off0000e045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE045 10500 bytes
SHA-256: f90a0e2b70ae37cf05d0e953c9e6c73e607b6230a4ef078dc27c5cbbab563fa5

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