Malicious PDF — malware analysis report

Static analysis result for SHA-256 21249dc972b851bc…

MALICIOUS

PDF

75.7 KB Created: 2021-01-03 16:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4f041f57a56056fe4f78fada90ed3345 SHA-1: 8e3629f7526939fd9d37bda9867bd19843eaba13 SHA-256: 21249dc972b851bcfe5a049e7d674c4a0103b7b7bb03df553b5cf7ec2157f59c
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 by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffking.ru', suggesting it is used to redirect users to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://traffking.ru/123?utm_term=director+ogpe+aguadilla PDF link annotation
    • https://cdn.sqhk.co/xafiguzi/AQjSZhf/descargar_air_soccer_fever_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/Ujbhjgd/spider_bites_pictures_in_ohio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488090/normal_5ff0c0a9640b8.pdfIn PDF document text
    • https://cdn.sqhk.co/gebijowokobe/FygULgg/tywin_lannister_father_s_day.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5fa41bcd1a721.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/aaa1c735-fe24-4881-942f-7c01bbe46888/contemporary_issues_in_leadership_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841de724-2c2e-4d07-92cf-14f6eeb69278/npr_one_vs_npr_news.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/bowanenasudonut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4da75c-6091-4cdc-8816-361a8141a1a5/xobobosebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76687f76-c6f3-40e8-9d7c-5059d768c3a3/modern_biology_crossword_puzzle_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D1 5060 bytes
SHA-256: bcc87ccb8a43a6ff6daaabc30448393f4365e4c3d67c9ede0d28b5d4aecca5c5
font_01_sfnt_off0000da14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 2864 bytes
SHA-256: c16b638891705980a1867e7721ee19dbd3f3d262f39210582f35b3ef9f203b07
font_02_sfnt_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 10984 bytes
SHA-256: b57784819e1f6df92e08c9cec94d491ab779e9669d0812f23276c5d4d2364b51
font_03_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 16492 bytes
SHA-256: eca83ba0c726b96b99a8a767537d46a242cbf573efb99f09ffd941e2211c2eee

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