Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c31b65cd3401e7b…

MALICIOUS

PDF

58.9 KB Created: 2020-12-15 10:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 547e70bd87b0252905b6c4f95f321b55 SHA-1: 93be3a15e25d3ab4501a4a423494bddfded02312 SHA-256: 6c31b65cd3401e7be5cf33492bc7d0f708bd7b310573bf14bf6edc718a064f9d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=e-max+super+electric+blower+vac+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444622/normal_5fd7b5e31a8dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f9c1a67c8279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379498/normal_5fc9f7850ae6f.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/6d10f244-12e1-46e4-b7cb-f9d3b9bef272/38803677835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5eaef00-9ba6-4536-aa64-e0f625e598b3/worship_songs_with_g_c_d_em_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246feb6b-c8ad-4535-a9ee-e508983c869a/zijevudilipobizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26270aaa-b08a-48d7-b3b3-d3331df5677e/98812855533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d311312-481c-4cc0-a72c-7dfa9b29410e/69585861706.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66f5c6b97992eb581654e/t/5fca82953162606f7d277a5a/1607107222983/fatal_raid_mod_apk_1._5._614.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe14b0e6d49a06bb5938b6/1606292658746/15478662231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d84db4-9753-4f3f-b04e-78e8d6f625da/84376893769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63cf7c13-1784-4d27-a904-0beab931aa02/patisokojezi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37ea38139af03765591da/t/5fc67209bc819f1cf4b63c2f/1606840842269/4794398088.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_off0000ab17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB17 5428 bytes
SHA-256: 97f76ca6a96c26d0ec956c63703263448c8907d2e0ec299888db7a8735e75000
font_01_sfnt_off0000bd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD94 9884 bytes
SHA-256: 95e4dac7e064ebef237637ae2a876cd7299f172aab08369e168ae49b6182ef51

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