Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae403dbb4bf7aa6…

MALICIOUS

PDF

69.3 KB Created: 2021-01-05 23:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0815acfcd9175fac83f25a08d2d2abcc SHA-1: 5a5fadd927c7cb3aa1c903176e59cbee33b217db SHA-256: 0ae403dbb4bf7aa68cb3916340d3c54aa3867b8da1500bacba4fcf8c3c1166c7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The embedded content, though heavily obfuscated, suggests a lure related to 'free download' content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://cctraff.ru/wb?keyword=courage%20the%20cowardly%20dog%20hd%20wallpaper%20free%20download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5fee9cf9eb2da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5ff47236d1e3a.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/dhigdFo/61931008054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5f9971a8bffd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f985e096b215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_5f98c2feeda53.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/rivazixexuguri/ragesa.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/gigefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07580441-bfda-45fa-8ab7-cf5604fb5255/classification_of_matter_pogil_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/kadenogenanomadawolijabud.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/sadhu_aur_shaitan_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/tuvojoperarik.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_off0000d1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D7 5340 bytes
SHA-256: f58143a8eda531bfe353dff7e19fd69633c5cbadf198063e38abdfff626163e1
font_01_sfnt_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 10672 bytes
SHA-256: b20b537a24ad2c876734737073f875a66a561ae94d4f9ff2c21afe0b2eb359f0

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