Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca4e74bda230a82…

MALICIOUS

PDF

83.8 KB Created: 2020-12-19 18:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1c755b9e4ce537a7dd59c2c5a7a0315e SHA-1: 98a3cba0d39a05818ed2142483df34b394c43fd5 SHA-256: dca4e74bda230a824405e53dc4eb28387168350fded2a4c9379d69756ba38e34
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL and heuristic firings indicating an urgency lure and ML-based detection of malicious content. The ML classifier output of 0.999762 and ClamAV detection strongly suggest malicious intent. The document likely uses the urgency lure to prompt the user to click the embedded URL, which leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/aws?utm_term=aicd+medical+full+form PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c540fe7f-c11d-43d4-804d-31a29a64e3f0/48765790560.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/givapugokimiwonixofop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b36515-8735-49e8-bdc0-906fb080e6dd/borudovixibevurub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0157d7da-d0bf-4adc-8083-d5475818fbab/anlise_qumica_quantitativa_vogel.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/easl_guidelines_2018_hepatitis_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65dd994e-8791-45ad-a688-abaa79713d51/27842629923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae08a11d-0982-4fa5-b9ee-87870ae20087/el_eclipse_de_la_fraternidad_descargar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0a5f6457125654014d6f/1606290017001/canon_mcmillan_high_school_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9980f102-7f8f-4b9f-b97f-8ac1cd45d60e/37137842652.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/definition_of_boutique_hotel.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/82617121446.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/20697282659.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1796fdf132613bbc1d0b8/t/5fc28eb364571256548f2cf2/1606586036068/riddle_school_5_walkthrough_red-blue_tile_device.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/81841360391.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_off00010aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 4976 bytes
SHA-256: c0011fc53fe6acc94d0cf63fac3b16c94e0c43617d85f6eb28233c8c80455492
font_01_sfnt_off00011b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7E 11596 bytes
SHA-256: 7226274eb708d571c342f18b6ff4dfd29578143aa5f28f5e3120af83201412b1

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