Malicious PDF — malware analysis report

Static analysis result for SHA-256 89060ae4b7a3fd8f…

MALICIOUS

PDF

107.9 KB Created: 2020-11-20 14:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c3f5fa3bd0cd219ed256fd1ed98c7641 SHA-1: c3d21f8643fc5740ad6d49c065d0728d490c5dc1 SHA-256: 89060ae4b7a3fd8fbeaf6eabe7a4d4f81d51291beb8a5b9e1639703d0e5925ad
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, disguised with text that appears to be instructions for stringing a tennis racket. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of a phishing or redirection attack, likely leading to further malware download or credential harvesting.

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://cctraff.ru/123?utm_term=wilson+blade+98+16x19+stringing+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4452599/normal_5fa86b8f430b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fac2fe6a901c.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/luramamelolem/apple_symbolism_japan.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/21266670997.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/36129234201.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/linen_cotton_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/b._sc_physics_honours_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/wsd_port_canon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177aba74-858c-4ac5-821c-18e89a29fc13/48228568785.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/pulmonary_arterial_hypertension_pathogenesis_and_clinical_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6a396e-07bc-4532-ba31-acf9309f99c0/nowubowig.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/contents_page_template_google_docs.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016b92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16B92 28980 bytes
SHA-256: 2bfdb721cacc32be59852dda6557aa84d81fc315629081ecf4d3ec29f814fcf0
font_00_sfnt_off000134cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CC 5884 bytes
SHA-256: 6fb58a07302ad48956e6d5884c2741c163077d55e8480927dd736cbfeb650d22
font_01_sfnt_off000148ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EF 10024 bytes
SHA-256: aeec1c94495db508f7f1f76d56efac9c1e4e1d4ae197e831236cfa031cf61bcd

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