Malicious PDF — malware analysis report

Static analysis result for SHA-256 021cb31cf5485540…

MALICIOUS

PDF

69.5 KB Created: 2020-12-16 13:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b86dfa68d1b3ac442518b10459569b0a SHA-1: d8042ff7f88fa79f42280e94c5ccdf1e859e5a0e SHA-256: 021cb31cf54855401d8377785911eaeb6de87892ccc7f5db7aed9780cae8b4b8
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for a game download. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL suggests an attempt to redirect the user to a malicious site.

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://ggtraff.ru/aws?utm_term=metal+gear+solid+touch+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_5fb76517a6c1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_5fb96e30d4a15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457838/normal_5fc42603dd8d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_5fad9ddc48c5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f91be0717acd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422908/normal_5f9f24c842d86.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/leguvefu/16605907116.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/18524518833.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc548af9955c744b5585162/t/5fcfec0751e8cf16f087fd17/1607461895847/finaribuvatirugujovupi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe14893c6ccf69f3268983/1606292618944/nested_if_statements_python_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a331975-f791-4a79-bcac-00f7dc6418b7/43793557943.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066bd9955c744b5390948/t/5fc1346ae6d49a06bbbd9e72/1606497387185/numorodelixozevofogusanef.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_off0000d088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD088 5404 bytes
SHA-256: cda76148c92ba2f76699b048a797b288eed8e120b637011c5ec67bd4f26fd0f6
font_01_sfnt_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 11516 bytes
SHA-256: c4e512fc2d9821983174d4e9076d34502f9a48d72e4b738b638a45ab29ceefc9

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