Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafc414f8628047f…

MALICIOUS

PDF

76.0 KB Created: 2020-11-11 18:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a76ad4fb726be2905feeabf8fe12ce8 SHA-1: 30adf0815aeaeb0dd97eb40f703d827d4eb2c80c SHA-256: fafc414f8628047f78ae9aae2b41cbe37672a1d3b6f29cafbbcb9093f9568cd5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=vidblaster+full+crack'. This indicates the document's primary purpose is to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

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://cctraff.ru/123?utm_term=vidblaster+full+crack In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5f89c1c5739e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87339f3878c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_5fa97a47cfc43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f911958cc1c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f95f96be8413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_5fa107308ef79.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/8acd9f2f-08e2-448e-af35-408f5aa71bf8/tilatavadavakediserolon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9d30dd-d264-44ed-99c0-2ae92ddd6b49/9800907340.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/torivis.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/dave_collett_757_767_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b20fb3-5a04-4fdd-aa5f-2a907a70a6c5/mivawomiziwivupobogizijem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5520681-1ddd-4cb7-a58c-39f6d7d0c50a/tawexukuburovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5dc13b9-dcb8-4289-a4d3-3f2c6e212798/casos_de_factorizacion.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/minecraft_pe_download_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd97b5b-6d61-4c96-8658-4bb0b632b871/83142991124.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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 5184 bytes
SHA-256: 3f67baf7f530ac5eb94fdf15a69e4adad488c1d8ef1fbacf8fc1fb0fbc8b521f
font_01_sfnt_off0000fcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF1 11352 bytes
SHA-256: 58bbbf484b56f7af447f93dcffb763e3dbc0c13cb25c020563a4cb872c79d3f1

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