Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaee019c4de7a68d…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 06:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 76d41414c1bf8c5e039d69f51ce2f8b4 SHA-1: 129049b835bf58c28eed34533a4fad7ca21d38db SHA-256: aaee019c4de7a68d6b3a1dc236d0c99df1aaa5310ea2c2976d661be5f333b1a5
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded URLs, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution via these links.

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://yafferge.ru/award?keyword=kitchenaid+superba+oven+door+replacement In PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/0550e8af9.pdfIn PDF document text
    • https://tekopazaxalar.weebly.com/uploads/1/3/4/3/134348639/4256594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_6008112d86956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412889/normal_5ff5be64a02b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_602c4f01bd973.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/0YgjjeR/55921201989.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/jil2udF/retuvomekesimatedotoref.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/45592c76c7c50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_600307110e927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370560/normal_5fc5a4e68b6e6.pdfIn PDF document text
    • https://fefokepixax.weebly.com/uploads/1/3/1/4/131452923/7505032.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/ibha8GM/serexafidewalusozub.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/N9ibCCc/vegatedexoribejukivedoz.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/tigewibejageju/emotions_draw_the_faces_worksheet.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_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 5480 bytes
SHA-256: 909a99530e72ff5af64eb9cf6286dd62f04d9530c0ac17d404c10d9982162b86
font_01_sfnt_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 10168 bytes
SHA-256: 0f389bb19f92d7b114b6b693f5f529181c2ef5c46ab079430451d973efeeb80c

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