Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddb466a644d84ff…

MALICIOUS

PDF

68.1 KB Created: 2020-11-21 19:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3b62da2078152ba1c942088e07083639 SHA-1: d3cba58ee9e27af56b551f084d86b2cdf5ea5d14 SHA-256: 9ddb466a644d84ffc0a2bae8578e320937553476b9b78eb75cd7c34ea414ca38
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a 'hid proximity card reader installation manual'. The ML classifier and ClamAV detection strongly support a malicious classification. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

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://ggtraff.ru/123?utm_term=hid+proximity+card+reader+installation+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f8dd37b84994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f907534c2030.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/0d2b7d5f-b427-4b6c-850b-53f596eaffa2/weschler_nonverbal_scale_of_ability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4ad071-c9ed-4aa8-b11d-65809dcef875/silk_road_dbq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db416e65-fca1-41c3-b897-574e56815f31/wopofobeluvedubogixumufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a80230-2f62-413f-86a6-7e6c607c506c/last_boat_out_of_shanghai_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/murirazarigojavusome.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/xamipuvoxoxokepuzefamo.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/fomesegegaxafogijesazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46dbb763-0b7a-48ca-87a9-64455a3a1424/25847695224.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/migamejofosabuzufipuf.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_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 5352 bytes
SHA-256: f8c95f004e503b16cffb8587d143fd2e142d0cb0ebc03721843f1c5b0a1e6692
font_01_sfnt_off0000e0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 9936 bytes
SHA-256: 67ddf7a45f8bad52901e238a97df33a599bf5e6d8aa0f013378ed18198d170fd

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