Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de6399e850179a8…

MALICIOUS

PDF

79.3 KB Created: 2021-05-24 19:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0f8fd5c9751e71e89c8c323b8d7077cd SHA-1: aa92c455a5dddb991353c3ce0e67de7c31a926cc SHA-256: 0de6399e850179a8db9b7fda83a35b753632cd57f33dcf25f7eeecfd8bd92590
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL points to a domain associated with potentially malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=how+to+clean+the+keurig+elite PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473963/normal_5ff0cc2c6e0c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5ff7e6d5636c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486344/normal_601dd4156cce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457857/normal_604ad193c9586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5fff69bba49d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_60109d7b8fa72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461766/normal_605400f5885c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455396/normal_6033a1b5ccf83.pdfIn PDF document text
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/wejibibakonipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_606a9508ca896.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/44d7abae293.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/davolazupivowi/91791131808.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/descargar_bejeweled_3_full_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/73228711610.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/vavatamususidovivepivoli.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/fepobap.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/tutapinulo.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/samsung_hw_h450_soundbar_review.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/active_and_passive_voice_rules_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/16357285983.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_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 5000 bytes
SHA-256: 64d22170f73d8d557df0778c314bfbdd688d1403e3fa94dc4ff9c0d24bce0765
font_01_sfnt_off00010b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7C 10764 bytes
SHA-256: 4af03c41ccf030f0a10c0f4b742a52c414a061c6f3b0b9044bf75044111e05b4

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