Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce01233efffc4f9…

MALICIOUS

PDF

88.1 KB Created: 2021-01-13 03:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bbe8bc6e50e9a44902c2116d6529cb82 SHA-1: e7d602829a0db356ef38ce0658cee1e23f1803e4 SHA-256: cce01233efffc4f9beb6bf6859943828cc01d8d18abe11aa99b89b8958f270b9
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 infrastructure, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=atividades+substantivos+biformes+e+uniformes In PDF document text
    • https://cdn.sqhk.co/titipubaduw/gijahhR/simerinuniriwoburakoduma.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/j8shdha/xirozelajapimemikise.pdfIn PDF document text
    • https://site-1235125.mozfiles.com/files/1235125/coreldraw_free_bagas31.pdfIn PDF document text
    • https://site-1239972.mozfiles.com/files/1239972/31017619287.pdfIn PDF document text
    • https://site-1195445.mozfiles.com/files/1195445/xikobeta.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/DsggGhe/xijusozixe.pdfIn PDF document text
    • https://site-1177895.mozfiles.com/files/1177895/serarusaboxo.pdfIn PDF document text
    • https://site-1183516.mozfiles.com/files/1183516/rusub.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/vipuxafol/mopefanezekalili.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/fizopabikixomitoziwetibi.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/cost_of_trapcall_app.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_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 5092 bytes
SHA-256: dab0782484173c60dd6e38e267d2ca6f2c17c91f239d0e1fbdb6c6fb4c72196e
font_01_sfnt_off00011c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C00 12892 bytes
SHA-256: 29c0bf7086b074a8b0c607608fac6cc09a157b2cf9b8d623f12a963c4fcb4993
font_02_sfnt_off00014333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14333 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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