Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a31595f3292ba3…

MALICIOUS

PDF

77.6 KB Created: 2021-02-20 10:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f08e8f9254b714892626c3dd85f71913 SHA-1: 1fe9d52b7a72b22e5651564efc268b8113de9ed1 SHA-256: c8a31595f3292ba313b269019182d9b8584b99a39011cd8a137bc2e2e04ac903
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely intended for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wix?keyword=lowes+build+and+grow+calendar+2015 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416131/normal_6005bd9c80f98.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/gfEwkRc/sulivatefunesekej.pdfIn PDF document text
    • http://dekupedatibidal.iblogger.org/total_quality_management_principles_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5fd698b8828ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450036/normal_5fe19997b15a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_5fd93afd01516.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/CdVRbhe/dofupekaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5feb1ab293d2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366676/normal_5fec4b4d17a6f.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/Lgd3idl/25779007462.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fce6435a7879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480889/normal_5fe8da931e719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://digegaleviverab.rf.gd/advanced_engineering_mathematics_zill_4th_edition.pdfIn PDF document text
    • http://joxelugokolutu.rf.gd/parent_functions_and_transformations_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/60813756948.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/23216346433.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/37504828158.pdfIn PDF document text
    • http://zufejudo.epizy.com/michelin_guide_uk_2019_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/bubuzulasowotirisitepima.pdfIn PDF document text
    • http://sitejaxikezo.epizy.com/setobapezuloxogebuxexo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A5 5728 bytes
SHA-256: d8e092379f25db10cb591543741655308f1bab5a58f9e93668ef9c03d41ae763
font_01_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 10444 bytes
SHA-256: 07e04b9ede32058e6fbe17993840bf639794065d0cdc84c15e720bca09f43e64

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