Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd118c462cb90a0b…

MALICIOUS

PDF

70.8 KB Created: 2020-11-23 23:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 73f0933e540448b2af26d2f5fe8fd16b SHA-1: 7745f57f2a061e1efb1a89648b31345a9a1ee565 SHA-256: cd118c462cb90a0b0dc7d0967303117cfc89119bf3455cd713b69bedf5180681
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, suggests a lure related to an 'icao security manual'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=icao+security+manual+doc+8973+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f912a1d37950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5f8edda87fa3b.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/kudowo/direct_finance_irvine.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/ophthalmic_technician_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/79142967129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2e72a0-518f-4095-9860-ef187217ef7e/guriwawizobifaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/gasabozonuteposen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9cd8d34-e6cd-4518-b259-64faa1b4c791/jack_skellington_fan_art_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eab3519-f590-4512-990b-9636d090f622/63128506152.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/rental_agreement_template_india_bangalore.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/34525706295.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/kugaxeladoxevejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ae3f28-bf37-4770-a2e4-344473f33bf7/45815511723.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_off0000d654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 5800 bytes
SHA-256: 3a04899e76ef457c3f44515628b195930c13e2c2ee629fb9dc31b1e7308b5fc8
font_01_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 10776 bytes
SHA-256: 2f0b8783703129a0c4a8014fd82c7dc22b46df9fca52a707909a8806318f8fa7

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