Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67dabc03728205b…

MALICIOUS

PDF

69.9 KB Created: 2020-12-01 09:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e9d7613603e9a98215521ad3c5844b1c SHA-1: 0a747fd41511efb07a23ff230b9b720bf7943de5 SHA-256: b67dabc03728205b169aa2f9fbb9927f73a697d0807a57eea1915ecd3f037a35
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier. It contains an external URI pointing to 'https://traffset.ru/aws?utm_term=android+10+one+ui+2+beta', which is likely a lure for downloading a payload. The presence of a visual download button further supports a phishing or social engineering attack vector.

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
  • 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
  • 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/aws?utm_term=android+10+one+ui+2+beta PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379234/normal_5fc5ec0a3ca02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445871/normal_5fb8b92a0fb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5fb5c24078ba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fac43ccd354d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fab7177cbce1.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/nuvukivaxiren/nekonajuvipem.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/web_archive_warc_format.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb1ae9fc3622d51d09b9/t/5fc3e6dd3c6ccf69f3d6a552/1606674143058/zidavugabovikes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809ae177-0e23-4303-92c9-88f1922832d0/starfinder_weapon_fusions.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/64974885553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae711a1-0c96-4d70-8461-4718da632c9d/99347629731.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/meditations_in_an_emergency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b187b49f-30f1-49c8-b0f6-103a31c109f9/feburusevepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ac9e90-3137-4e7f-af7d-4d7d8d17bac0/3458141670.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/android_applications_source_codes_and_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/36060487114.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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5064 bytes
SHA-256: eaab4002fbe3ab5462ee844e8dcb933c44e75f81953537c9af88f8d03f508c5a
font_01_sfnt_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 10828 bytes
SHA-256: fbe357fb99ed1bc2f44078ff645498d549fa1b8c166dabd8b241e1c1d64e61c5

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