Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c714c126e1c7cbe…

MALICIOUS

PDF

69.2 KB Created: 2020-12-13 15:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 88241ffb27ecde47c0e2321f18670631 SHA-1: 4c35f3ff21eac2dda2f0cf27bca7095ec114bedb SHA-256: 3c714c126e1c7cbe0045e3404c059fc954e955b24876a8808a498bf8d142e09b
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to an 'application form', aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://gettraff.ru/wb?keyword=university%20canada%20west%20international%20application%20form In PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/tefusisarakaw-wekiwejeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470698/normal_5fb3567e891b4.pdfIn PDF document text
    • https://zativazu.weebly.com/uploads/1/3/4/5/134586929/zerevabilozilip_norewezira_nefubuminuw_pijeviwukifuru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418575/normal_5fc3e8ca91c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f9157325292a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6d0c6791da6493f6663f7/t/5fcf1a8068c18617d40ab836/1607408261210/european_history_timeline_700-_850_ce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d1f51f-acda-479a-8904-1d9aa46ec19f/jenny_lind_crib_hardware_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1315f846-d872-4c2c-b40e-64d1a34ae47e/tavafurifex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c172cd1e280355ecdbe2/t/5fc6c664c953717e09c30216/1606862437045/zojefaleleduxovesorot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eff460f2895dc1e80f14/t/5fc4e671173fb5383b3d6494/1606739569453/gta_v_hotel_assassination_stock_ps4.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_off0000ce9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9D 5548 bytes
SHA-256: 11688b9b6fd6104810d8fcc03abb06a767b8a2b74eda815466e594318a0d3c5d
font_01_sfnt_off0000e186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE186 10680 bytes
SHA-256: 01c804ee0b5136ef393ed2fb93560d8569e02f30583d50cab05c8cf575eb6984

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