Malicious PDF — malware analysis report

Static analysis result for SHA-256 5130e36e78405e98…

MALICIOUS

PDF

68.2 KB Created: 2021-01-06 21:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 161fc2f501347930c10b4100e314a4de SHA-1: d952c9e5c4b2657cc4db8322d17a8b0423e4c8a5 SHA-256: 5130e36e78405e986c5d6938cf9552e6350e399e3df7bd6453eb03026ed1e529
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a game hack download, which is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a known malicious redirector, likely serving as a first stage to download further payloads or redirect to a phishing site.

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://cctraff.ru/aws?utm_term=candy+crush+jelly+hack+apk++free In PDF document text
    • https://cdn.sqhk.co/loxepafigav/ehbjaGt/raxizoru.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/jias4jc/24009789359.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/jinabom/zaguwikekafusesidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4075b7ca-1a01-4c2b-88fd-f6462d5f57bb/60339574633.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/finding_the_nth_term_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef98f4d-3e83-431f-b183-126d536c9a11/bosaxod.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/peak_test_extreme_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a46ff6-79dc-47bd-b580-00651280d1ca/sonny_s_barbecue_menu_pensacola.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/9102639787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f33ccd7-a08e-4e42-900e-298cc7ab8a52/webosoziz.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_off0000cdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBA 5388 bytes
SHA-256: 8e1d3b666721586ac28087353cfb6952396b2a3a8e341c70e37bb68256a9a828
font_01_sfnt_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 10624 bytes
SHA-256: 1385af3744ea2b4a3b98b77ba6bdf062236701f9d5cced7b2f5bd09bdfa5f6ed

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