Malicious PDF — malware analysis report

Static analysis result for SHA-256 4474a816431d9345…

MALICIOUS

PDF

79.1 KB Created: 2020-12-23 00:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 05f04e7dd85681b6c09d02ae9e9a03e9 SHA-1: 4e8ef5e594631c5b7803f4a8857a8b0d298d0147 SHA-256: 4474a816431d9345245fb77399d5777e6c9fde351ae105c4d8b97e2012f7ba7d
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 a phishing attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/123?utm_term=high+school+chemistry+textbook In PDF document text
    • https://fimagokuzite.weebly.com/uploads/1/3/4/6/134681622/wajibemig_seturerufame_jasanaxugoje_tevudawovegemob.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/limadizade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496153/normal_5fcaec30521dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mipeboro/bekuzuburigugoven.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1ee63c02f22b9dd61749/1606295271591/95686911692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45aa51b-8479-409f-a2e5-73b9c361ad15/sauder_end_tables_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/nilasodovepu.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/hotstar_apk_direct_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/72076766813.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/52905036478.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 5020 bytes
SHA-256: c051cf789433cad2b3a29f12152b671f0254425b01f39748804c3b97681de26c
font_01_sfnt_off0000faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 11368 bytes
SHA-256: df7feeb7967d2a67ba9f605ad28e14a29e08bc6167063f0e0f0f21c2e4a88e80
font_02_sfnt_off00012155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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