Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5f5d8853e69c44…

MALICIOUS

PDF

62.7 KB Created: 2021-02-20 03:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0f650d9b35ce0c4bbb32e8245150b069 SHA-1: 738e89b4faf8b39c1ea4cdd441f11322411874c0 SHA-256: 2c5f5d8853e69c4460ba2e943de9908ce15cdc5670069007e68e05977733842b
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, likely intended to redirect the user to a malicious site. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple embedded URLs, some with unknown reputation, further supports the phishing and potential malware distribution attack pattern.

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
  • 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://bologen.ru/wb?keyword=lasko%20oscillating%20tower%20fan%20with%20fresh%20air%20ionizer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472208/normal_60289761c3078.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/qgdC0uS/87535270098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_6005823eaefdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_600658867e25c.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/bhfjeja/zowawufovebuzadojeteri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478387/normal_5fee1c6d24cb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_5fee7fdba0763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_6017689d388ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_6027ac44233b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476432/normal_6003493913b07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_601fca6865d83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegiseko.epizy.com/53718601695.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/aurora_hdr_2018_patch_free.pdfIn PDF document text
    • http://datifuvuk.epizy.com/poxenovazefa.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/mikozikuvazafadopolezog.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/poxagaredil.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/zusuluzubelafevipukun.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_off0000bac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC9 5288 bytes
SHA-256: d09419a41b8620c12c6c955f92e37b637a6a618ff0c77cd86c57242293a5c1ce
font_01_sfnt_off0000cce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE3 9564 bytes
SHA-256: ee8f74d56945ac60257fde2a59b9cc8eed172e305b4529036302e2dc3cef1a1d

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