Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a9ac6d32043ed5…

MALICIOUS

PDF

74.8 KB Created: 2020-12-20 22:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c8ad002f9900625839196688e6673d0a SHA-1: 2171e7a68723dba2a0079f164f2a46b12ecd39fa SHA-256: 28a9ac6d32043ed5f5b6f043b50fa81bc6ee518b6740ca2813e6edfc7d47ddbd
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site for further compromise.

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/strik?utm_term=supreme+court+case+studies+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f88c9b8e85cb.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/a2aa7d61-2d1f-41d7-961f-8a55f6fe4952/lasapetexexukexazadu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/full_action_movies_hollywood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c1ab0b-624e-4bcb-afcb-a345f0bc9538/knex_instruction_books.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de01bd14ff0dd2be9a03/t/5fd11a0d300a2d1a7a139abf/1607539214794/all_flexiload_sim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1d0d6bd14ff0dd2a325bf/t/5fcc1debc836a917f9fbe9d0/1607212524548/55315626260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590e11b1-99d7-4fa2-9a4b-c77f9bd2bbf2/the_will_of_god_will_never_take_you_verse.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50c986b97992eb5766a10/t/5fd6962fde5b1220c03336ed/1607898672515/arum_lily_flower_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ab0310d6a92a736d7bc1/t/5fd6e424acac596b0ccdf4bc/1607918629317/bunogemujolukinutavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7d07a1-c708-441d-be51-8fabddd2328d/the_case_of_a_self_contained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cbf2941-2272-411b-bbad-b91461d8b82d/wibajixarolifutudatile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65db2115-ed28-433a-9da8-df67eeec8bb7/ap_stats_exam_2019_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 5540 bytes
SHA-256: 13c04e7f5fc989d301251af6acfa4baafd3d2aa98be4f571be6ddc92588f0e56
font_01_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 10124 bytes
SHA-256: 2823770154b81dfd5f540defcb47ec892f394bde331aac96f73d2cf9501831d7

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