Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc8bf0973833c04…

MALICIOUS

PDF

81.8 KB Created: 2020-12-17 15:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: febe27f047023ad3f735d7763fe9739c SHA-1: 35f9de3f2a16bac40fbbc39157cdf81dd577db34 SHA-256: 7fc8bf0973833c047d9304c685bb450b48b5549003088093ca67c8c664973eda
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an external URI pointing to 'trafftec.ru' suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate it's designed to lead the user to a malicious site, likely for phishing.

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/aws?utm_term=berkshire+hathaway+subsidiaries+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500453/normal_5fda58557fe91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5f9414063275a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fcdc4773091d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_5fb817d4290cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f99596ebf463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5f9cc2d206954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f6c738-42fc-42d2-84c4-9742f21d32af/unchained_melody_righteous_brothers_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d49377-8f82-4aaf-9b8f-99fe1d11f6c6/estrategias_de_enseanza_aprendizaje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5768fc6229360eccbb460/t/5fd1fcaead61ab58318f2964/1607597231893/75933042211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f91d43-ec82-4e8b-bed8-e58b90fed677/boxexoforojukubitata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04dc745-a05d-4b21-adeb-a326b924ab3b/sebiwusifober.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc57effb-daa5-49c8-b754-6dfe5916f73e/simple_machines_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc385f1c89e1c4b8fcf14f7/t/5fc7000b5060c93fcd72aea7/1606877196607/erepublik_labs_romania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9046163f-70b5-4806-94bb-de74bc0b3d88/amoeba_sisters_video_recap_prokaryotes_and_eukaryotes_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5add9f9866f3fd2f487b8/t/5fcaae4fa89a5a57c5fea62f/1607118416166/cat_warmer_pad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c73c26-40a9-4a7c-a65f-0fefc37dd98c/chantillonnage_seconde_exercices_co.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 5544 bytes
SHA-256: 7fda40049f2e7143fd2716411f1d06a362a2c21a663c3e853140d7acd45eb997
font_01_sfnt_off000101d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 12240 bytes
SHA-256: d3060013734d1bcc51fcc9fb73c024dbb922a1105c507e80238605a3d532c67f
font_02_sfnt_off00012ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB6 6128 bytes
SHA-256: 7b4eb8d14f29588e3896155be438c9309611e47e3fec554f92fc966acd51ce8e

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