Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0737b7e045585c6…

MALICIOUS

PDF

68.8 KB Created: 2020-11-26 04:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d1377cf97608889ce4f6cceff1b8fcc1 SHA-1: de173ef55383f3155efdba9bec2f3473507976ec SHA-256: b0737b7e045585c6077eed8fd791daa412d519f29c4f3955fa782706c8a5f87c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=big+brother+episodes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f9090f42bbb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482645/normal_5fadce34e32a1.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/8448799.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/956887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fba9ceff3905.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/gepupidumigeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5fad6c4d8d56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_5fa46fbade7f9.pdfIn PDF document text
    • https://vasoderavir.weebly.com/uploads/1/3/4/7/134728489/nuvibemutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dd555ee0-a4a7-425b-a5df-dbe698897874/dujosunefaxidevavorez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba975a20-8585-4df4-b49f-30a96ee8c6d8/date_a_live_movie_mayuri_judgment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab55d5ea-21a3-46ba-aaf2-ff39dd3d9c10/bawexugusixawivoxunujipa.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/default_checked_checkbox_in_android.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_off0000c32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32F 4852 bytes
SHA-256: e9112698e296fad77c89354fe54b41c460691a76b986e163497511d0e8aa89f0
font_01_sfnt_off0000d3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BC 11204 bytes
SHA-256: 1dc9dfcb56c990e71fa3223a8d8f6ff48e7610e86f7651731992d19936677606
font_02_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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