Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae185e69957ff6b…

MALICIOUS

PDF

67.3 KB Created: 2020-11-26 23:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: be5df64ec6a8d5141a3e34cea945af88 SHA-1: 3d0a445893b930dc9e30e37619bf9d066f2e8482 SHA-256: 3ae185e69957ff6bcb5017a320a513a20baadb0e90ebd5a9630819daf6d9d8cc
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 large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection mechanism. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

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://gettraff.ru/aws?utm_term=email+template+for+business+relationship In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5fa41ef494223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fa4296f73022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5fb42b700882b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5fad3834db670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fbd68197c942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5fb28fdb6eee4.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/kigetaxevesuf-rarom-mifenurufet.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/veravidaxuk.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/3015695b-98f7-4213-aaa4-3585c0235721/81359587713.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/7788510407.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/teaching_bursaries_for_2019_application_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/lemezikoveruwegibajabira.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_off0000cad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD6 5236 bytes
SHA-256: 049d5ac1ecd2bf00d83c119530c197f5ee2dd5861e9b53a97e92b1b3f526002b
font_01_sfnt_off0000dc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC72 10476 bytes
SHA-256: c2b56f92bdf6df3a6b0e4dae5688a7d7b05f6ee1bc3bcddd875f3718508aa451

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