Malicious PDF — malware analysis report

Static analysis result for SHA-256 a056a8692f7dd4c0…

MALICIOUS

PDF

69.1 KB Created: 2021-01-03 11:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b7973380fa6173dc458ec81cf1059c5a SHA-1: d083e70e621935027d4f8c5dcaad1b3b920b0bfa SHA-256: a056a8692f7dd4c0701e2bcc979815f3a7a3bba7d2e188884d6716e54a007930
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or divulging information. The document body, though heavily obfuscated, suggests a lure related to educational content.

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://traffset.ru/123?utm_term=apex+precalculus+semester+1+answers PDF link annotation
    • https://cdn.sqhk.co/lenawemijixe/bfegfbB/marvel_unlimited_plus_membership_kit.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/zopokuruguteje.pdfIn PDF document text
    • https://cdn.sqhk.co/lutaxudepoje/x0ijheK/jixubajuxedixi.pdfIn PDF document text
    • https://rarezeromodon.weebly.com/uploads/1/3/0/8/130874170/13b34ea.pdfIn PDF document text
    • https://sulajaxa.weebly.com/uploads/1/3/4/3/134362611/molalowafa-sadojogijidudu.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/ravobewojuduk_mugefu_wizudirujitut.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/ehjHieg/unikitty_save_the_kingdom_mod_apk.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
    • https://s3.amazonaws.com/tojazudibumogab/nupeluvotofaxafafoxag.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/af_form_428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5de8330-e3c9-4832-8666-0f5d0052d748/afaa_primary_group_exercise_certification_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/laminated_plywood_sheets_in_hyderabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1172b1f4-f21a-4f95-9281-4b00ddb709be/lepalebibegev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75A 5004 bytes
SHA-256: cad92d395933e9279a1ce8d1b4f7c6fad76f34d2908c34f27e25dc3340fd536a
font_01_sfnt_off0000d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD855 9756 bytes
SHA-256: 5f7b4ca5addc0d596ab33d64fcfcbf80ab928aa06641ebf2e3d3e63f9927d1e2
font_02_sfnt_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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