Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c9ba5731a893e0…

MALICIOUS

PDF

80.3 KB Created: 2021-01-05 18:03:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c077ac71a65d616428f0be1e6ee32ba5 SHA-1: 2c643561f8e74cd95b13356a3f8d1d0ba0bafeaf SHA-256: e6c9ba5731a893e0d436727e726eaffac8dc1ee7f03df71c5e53e67e56a9a54f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that appears to be a lure for downloading a modded application. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing or social engineering attack aimed at tricking the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=mod+menu+apk+download+for+8+ball+pool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482407/normal_5fa7d50291fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_5fab521d7baad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_5fa109af9e52a.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/e1f03c4c-7b04-4979-bf6d-bbec227f2dbc/58739449791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6917d52b-36f6-43d2-b362-c2692218f35b/giriimcinin_el_kitab_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/technical_report_writing_in_information_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d30a110-470b-45ca-ae8e-48f85b0cdd1e/69481545143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7100f403-c84f-4cb2-8c0e-53935014cded/webwork_answer_key_precalculus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6a0094-1900-4451-a7f3-88b50fc0299f/atr_42-500_seat_map.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/30214182882.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/sutiwetopolideresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24232734-39d9-49c1-b58a-0a708d4e5f05/the_creative_spirit_an_introduction_to_theatre_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/34239267685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1638db55-52a4-4e7b-9d67-d3a46ab4e27b/33424263454.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/agent_a_chapter_5_apk.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_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 5504 bytes
SHA-256: 563c4f027a32970e96200e1ee94d4fbec3374d3269a4d7e1d5f2de910c748510
font_01_sfnt_off00010d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D80 11452 bytes
SHA-256: badb454489580b4b295109f8a83cf16ad2a4227ddf5fdf9a92bdb261647295ba

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