Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f078a9b79e3580b…

MALICIOUS

PDF

69.3 KB Created: 2020-12-11 18:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 45c3e6b868e9cfb8ac5317df55954263 SHA-1: d66de0dbe8a5fca1ff76929ff424cf9f7f44c606 SHA-256: 8f078a9b79e3580b8e81a8c5ce3471843cbac66f5910c110dcc2ee71a02afb6a
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/strik?utm_term=singer+simple+sewing+machine+manual+3221 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fa7ed6754923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450907/normal_5fc90ae970474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_5fd10f2ec46b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408720/normal_5f9697ac326e9.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://uploads.strikinglycdn.com/files/9f4a01dc-01cd-4f84-a732-f21434157df8/food_for_today_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0d289c-51f7-45a3-9b01-0a1871ba3093/chinese_calendar_gender_prediction_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f96749-4950-48cd-9327-f4fc571622b8/tokusi.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/my_sisters_calling_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/bitojoxabixitewavifemi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/body_scanner_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6927aa-aca4-43e9-bfe4-ac719566d359/vr_simulator_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7087b1d-3de6-4d65-94ba-d5cdc1c90770/vaxemipewef.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_off0000c49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 5584 bytes
SHA-256: d74e3ddadeda16a6d09ab937c6149cc610e2ae566b50701ecff6fee83f3a75ca
font_01_sfnt_off0000d76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 10292 bytes
SHA-256: f08674be72a9138490a56e72ac2218828add8492b0534f1587528440c4b718ef
font_02_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f