Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9071f04e7d8d2d…

MALICIOUS

PDF

77.6 KB Created: 2021-04-08 18:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 63b6f501262651ff396064aeaf55974f SHA-1: da464b7cfecc8ee4f563f4efa2d327d2a5fe6f18 SHA-256: ae9071f04e7d8d2d760e84f0aa228cc97e4ae870b6f27a53858d083c94540fce
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to a search query, and an embedded URI points to a suspicious domain, likely intended to host a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://nipisod.ru/strik?utm_term=what+is+red+poem+meaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408703/normal_5fefbf109fbcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481065/normal_5fc8b13216975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_6059efc526141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_600c270a2e838.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/gOF83hc/top_ten_retro_boxing_gloves.pdfIn PDF document text
    • http://bojapebonan.22web.org/rexulokinitulikasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_606d047d17fe1.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/STmgfj1/gravity_trampoline_park_snellville_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/jCdKjeZ/27209336126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_6064e3c175c71.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/KP859jb/13606714815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_601dbeee0c431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_60322494c8ce4.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/gijpagf/jajof.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/djed6r7/cannonball_launcher_fallout_4.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/fRhdxra/1299666271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_604ccef5bf871.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/vig9Kbt/wipadabuxorarupifaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_602747e164de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_6065cd6beb500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_6065b143ba4d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://durevitulo.rf.gd/chill_pill_label.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_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 5356 bytes
SHA-256: 2c836a6826b2e83af6a1fa54db1fdbf04e659e49e3461351424cc2a2bcc8c3cf
font_01_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 11064 bytes
SHA-256: 6657ba8b82b9db10dc154a65b8cd907c5744a54b02318f9d2857f80a3da41d09

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