Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f92006daca319d4…

MALICIOUS

PDF

99.2 KB Created: 2020-11-24 09:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 35bf67341526b1d98002a9d1525447a2 SHA-1: d2baf5d5aeb3811e007cc4705b0dab14e1f63930 SHA-256: 4f92006daca319d4b0c3a42b630e74e6bfa32709232ce4e2d83ad85bc128ef6b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=all+gujarati+bhajan++free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445573/normal_5fa0d33888ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_5fbb509ed2162.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/4096527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5fa86eab75935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5fa1b7856dbc0.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/e49f0eeb0c5.pdfIn PDF document text
    • https:///\/a10.gaanacdn.com\/Images\/albums\/13\/2143413\/crop_175x175_2143413.jpgIn PDF document text
    • https:///\/a10.gaanacdnIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/vavale/barreras_de_la_comunicacion_fisicas.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/58328209216.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/zip_code_of_capas_tarlac.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 5056 bytes
SHA-256: b7db69f6c4b76646b50a608747cc13fb7d1362abd0ae3fbe5c4f13ad3ade30cf
font_01_sfnt_off00012f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F05 10676 bytes
SHA-256: 37db9635c93ce21aa499405df1516abd528f3312c09c34a651ac61cac19461c9
font_02_sfnt_off000153a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A6 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_03_sfnt_off000168e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168E9 6568 bytes
SHA-256: 5ccbfa6cda15630e883530873e59e89177f5e62703426035d65212c93799eca0

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