Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d59fa4e2a9210a…

MALICIOUS

PDF

70.0 KB Created: 2020-11-24 08:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7126f719f2351488297ec8c0db05e862 SHA-1: 1af0af4f99cd20bf754b2d1c03954711530e9436 SHA-256: 12d59fa4e2a9210a12d18e1940106da9f5b27575b8eca283392f6e22dedc50be
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=nature+of+electrons+study+guide'. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier and ClamAV also flagged the file as malicious, reinforcing this assessment. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=nature+of+electrons+study+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f91443a44d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_5fbc92375c0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_5f9c26f2c8325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_5fb65f6addec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8717fa20451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5fa7b4a5e6546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fa201f5cdc90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5fb429047f6c2.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/bisute/kahili_beach_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/goxolu.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/88765786000.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/the_wharf_ventura_feed_store.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/37172824380.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_off0000d482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 5260 bytes
SHA-256: 262e247510e508d024fe1ee0e382270652fcf4537ace415079d8823fff9fcc5f
font_01_sfnt_off0000e687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE687 10772 bytes
SHA-256: 4c707e9cf160f00abd823599dde4e68cb60455e3727a8d7308618e226e300903

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