Malicious PDF — malware analysis report

Static analysis result for SHA-256 91302d645b24b917…

MALICIOUS

PDF

74.0 KB Created: 2021-01-13 12:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 223c35998e6590186a84f5ed0c564ed8 SHA-1: 9955e53a063036f4b2f1a374be41b01275947b9d SHA-256: 91302d645b24b917842bb7c29a12561e14ea676e681d6d43c2b677a119c97933
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffine.ru/123?utm_term=access+case+statement', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'Access case statement' and 'wkhtmltopdf', suggesting a potential lure related to access or a document generated by a tool that can be abused for malicious purposes. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or downloader attack pattern.

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
  • 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://traffine.ru/123?utm_term=access+case+statement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fe68790be5a5.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/Fieigkg/resume_writing_business_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/6J4ShuW/serato_dj_sampler_pack_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5ffd46f49f607.pdfIn PDF document text
    • https://site-1173352.mozfiles.com/files/1173352/10529485759.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/Cbhhmy9/jurassic_craft_server_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8bcb7704541.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/gjooahe/stick_warfare_blood_strike_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/hjhaYg9/jio_meet_app_download_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/jajc9iA/49274542440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_5fd145039bf61.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/ejcgiXl/bidonemadajewenugezut.pdfIn PDF document text
    • https://site-1177067.mozfiles.com/files/1177067/28960849914.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
    • 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_off0000d83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83C 4436 bytes
SHA-256: 49846252312891551a0b8eb42d4c17b07e43023defa3174520cb0965763ff2d1
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 11120 bytes
SHA-256: f9db9748e5e7fa67df369fef7f588373cb985422bc73b08e966b9ff777ff9ee9
font_02_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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