Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb37d513e4e942a…

MALICIOUS

PDF

936.7 KB Created: 2021-03-04 06:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1d6ee2283b25762d02840d8214d81347 SHA-1: e624416401279122c268e0e45a010adba9f1f46e SHA-256: ebb37d513e4e942a156a0e9b980e24d5b902952b5db1d272ceecfd1939c7c023
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and contains a critical heuristic firing for a PDF redirector link to a known malicious domain. The embedded URLs suggest an attempt to lure the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing its nature as a document-based attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0935

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://yafferge.ru/strik?utm_term=orbiting+the+giant+hairball+by+gordon+mackenzie+pdf In PDF document text
    • https://cdn.sqhk.co/ziwetuvije/vjixZjb/76427345327.pdfIn PDF document text
    • https://wujuxibivotalo.weebly.com/uploads/1/3/1/4/131453464/dalujo-xixafas.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/varafegawobugile.pdfIn PDF document text
    • http://pefumaviba.22web.org/77090746528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_602c557e79a0d.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/jTqdNrt/tevuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/bOvfger/mojagadaketijojinivupal.pdfIn PDF document text
    • https://cdn.sqhk.co/gimowiboxero/ihvAha0/96554833344.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/linimok.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/jgmaKVu/50640945697.pdfIn PDF document text
    • https://leviwajij.weebly.com/uploads/1/3/1/6/131637177/jopuwafanejeroj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_604054430471d.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/hjhhdgd/running_warehouse_location.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
    • http://zitulogakapede.myartsonline.com/zexepobimuxo.pdfIn PDF document text
    • http://jesavel.rf.gd/bugojegivol.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000e1fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FDA 8496 bytes
SHA-256: 3b18c0a54da6c7d2d9491d405337821cfd06edcb6e54b7da8b2c306fc0f0936a
font_01_sfnt_off000e3b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9F 5564 bytes
SHA-256: 424d85de706957cdc3bad75e8eda4f60e4ca32f23060e4daeeff1a0c2c5e96a5
font_02_sfnt_off000e4e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E75 17844 bytes
SHA-256: 60bfcf9b3e6026b489b469c8603e4ae8bb38497d5731043ff2bcf6dd94448813
font_03_sfnt_off000e7e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E47 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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