Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27e27c1920052f3…

MALICIOUS

PDF

105.7 KB Created: 2020-11-10 14:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 57c3d88be99582e5052685778188d9f5 SHA-1: ca0f15329ec4e1c2b20d2d462e88f0fa7874137e SHA-256: e27e27c1920052f3feeec93af50d3ef9a2dfe04298d20eabd28b5968ca131367
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 link to a known malicious redirector, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing lure, likely using embedded JavaScript to facilitate the redirection.

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://traffmen.ru/123?keyword=oil+rig+explosion+april+2010 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f873d2c5e9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fa0ef402b5be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f9dbb21caec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8714764bed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8fffa9eb474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8a82d7cef7a.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/paxuvagal/howrse_pass_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/lifuweju.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/fogosoxetodabinasux.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/fosulexukapoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/official_guide_toefl.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/legodanaginepon.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_off00015f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F1C 5408 bytes
SHA-256: 3b811a46a2b336f411c4e1b130327ff9323c2edbded1cf7d6db9ed754c240baf
font_01_sfnt_off00017198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17198 11884 bytes
SHA-256: 6950d85b16baf17d8471439c6568c64a4ed52ac7b6a1d80d423040d159c0c38a

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