Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2846fbab1c5e8b8…

MALICIOUS

PDF

82.3 KB Created: 2020-11-18 22:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e378f2c7516243be1f8efc64918c37fb SHA-1: d30c9eba8383ed00c06cda82004ee79803bc659f SHA-256: e2846fbab1c5e8b8dc3a767e0b2551eef5d54c9e1c5b575fe6518e323b1374e0
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 document body, though partially corrupted, suggests a lure related to 'interactive tour of ellis island worksheet answers'. The ML classifier and ClamAV detection strongly support a malicious classification. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=interactive+tour+of+ellis+island+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_5f937e1c7fcf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fb3ce53b3f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5f8ed0d64ccf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_5f9e4406d6348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_5fa0b239ac595.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b21780c-3707-417c-aa57-276d89b14fda/40677895329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba88c4d-a56d-4e46-a77c-8cf19d15f3e1/regulikewu.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/myplan_login_pusd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123fd126-1fd5-4ed5-b521-1035245e11f4/17_year_anniversary_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4035526-f73b-4bb7-9d2e-93fbac247cda/que_es_una_rectificadora_de_cilindros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9839d42-59c4-4992-8aa7-39b0f1ffe355/paranafulu.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/xirugekimekavejirupiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e8c7d2-bccb-4e0b-aa1d-bedecb027d42/hiraoka_yuta_blog_sites.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_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 5260 bytes
SHA-256: 876ccd7e3acc5a10636b967b533d34cb0f6126dd4dbc4098073bddc780635cb7
font_01_sfnt_off0001192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192D 10180 bytes
SHA-256: 845b0a0a6c7ee067c6979ece0a16ed519f001b548b0cef5c03421816d1f998e1

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