Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e88c185f7690e43…

MALICIOUS

PDF

62.9 KB Created: 2020-12-26 04:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 133c88136d73a176bfa66aeffdb919d3 SHA-1: 88669244e0ac49f610093ba0fcf3240fb343b29f SHA-256: 5e88c185f7690e43be341f81dea1fdce145426c2ac9f7617e93f6af8eb85dd61
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One of the primary links points to a known malicious redirector, and another leads to a PDF that is part of a link farm. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/strik?utm_term=toilet+paper+cat+run+fortnite+code In PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/zolifovukub_mofogipuw_suwumop_vafinet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8f0552474b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_5fdf15f43e904.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/nisag-zavikuteke-fiwoju-duzuxenitipew.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/5655865.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/kefefetafij/biography_timeline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/youtube_meditation_videos_spirit_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/59345002468.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/84360228822.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/dopoxel.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_off0000bc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC24 4920 bytes
SHA-256: f02fc210c1cc0babd0cc73beacdde6aa06b7a7b5f6bea4fe31c24f682edc53f9
font_01_sfnt_off0000cced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCED 10048 bytes
SHA-256: 0a9e0c9e255fd7d357251b2f37e799ef61f90f5e0eb7e8673ad5c1d58b252e4c

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