Malicious PDF — malware analysis report

Static analysis result for SHA-256 5799fc4d52701d72…

MALICIOUS

PDF

85.7 KB Created: 2020-11-09 22:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f2c34d651139bdf6b5ab96dbc0461fd7 SHA-1: a767495e49568546a9efe29c74a5fa9ec6905e7b SHA-256: 5799fc4d52701d72a2f7f58df9139ca4c990c0db9766627a5e393d0f4e4e01b7
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector and a link farm. The primary URL, 'https://ggtraff.ru/aws?keyword=putlocker+justice+league+2017+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?keyword=putlocker+justice+league+2017+free In PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/selakur-zokowabokiluj-kimexajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5fa8911de20ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5f97308f33215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f92469b6ea27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f9d3530ba7f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_5f9b0f437d835.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/2077263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f874e5be099e.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/jobavo/fagutudemajiratapa.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/xanozawarefuf.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/indian_cabinet_minister_in_hindi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 4212 bytes
SHA-256: 8ebae7d596bd9f6ef26b2ed8a04d3723425c028c97dea21fa02cf23e55ef36cc
font_01_sfnt_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 5596 bytes
SHA-256: 5f2ddf76e8a18b21babcf3e882d1464ba3125585ce718ebb40e84938f49d1158
font_02_sfnt_off0000f5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B7 5768 bytes
SHA-256: 54e9c183ead929fed034614fa4f3c957e9adfc68e3cf6a7c0fb31945d99d19df
font_03_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 12140 bytes
SHA-256: 6af4ce444c16ec3fec0525da5376e55ff629dff0f284e51eaa00502e123ed0a9
font_04_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 18284 bytes
SHA-256: 61597bd3dae5613697b70c10394e8177edc067ba81fd8ce2c949da3806b02467

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