Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cba7b3526fd18f…

MALICIOUS

PDF

67.7 KB Created: 2020-12-16 18:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9c8ebc6d1d0fb09f5b317c9b0c299423 SHA-1: 9f37110835e0f729dac8b39340ab46fb19587027 SHA-256: f4cba7b3526fd18ff52fdbe38bf6f5d0f31d906d615aba9fea8b47531631ed72
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafftec.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the external URL indicate a likely attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=direct+variation+algebra+2+worksheet+answers PDF link annotation
    • https://ramorebuba.weebly.com/uploads/1/3/4/8/134898890/bilejawo-kilovatudezuj.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/fejajowi.pdfIn PDF document text
    • https://gekimirit.weebly.com/uploads/1/3/4/7/134700474/b6045.pdfIn PDF document text
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/lonejuvexi-getere-nivotaze-gabew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc51b2f17e7202640054395/t/5fc651e13f75b16643ab6ea0/1606832609697/photo_editor_pro_app_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2740a2757459be2c9b8/t/5fc121c14e98326c023898bc/1606492611314/zugetezesidotumav.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/vunonixevo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/ancestry_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/gezukixitok.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/setotunanebinaji.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/bncc_educao_infantil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b406c07-b777-40c2-a10f-e715c5d2919a/jujanoniviv.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/forgot_apple_id_locked_out_of_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/43365898380.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_off0000ca50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA50 5548 bytes
SHA-256: 49fbb2682dc3d1aef605b7c55afab06785f569d5f10b5b04686a0d1a3752e722
font_01_sfnt_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 10692 bytes
SHA-256: 08276130ee6fe0ddb49b2015d96fffca0b801d10555096ca912a1d8fb3376583

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