Malicious PDF — malware analysis report

Static analysis result for SHA-256 6573d6afe9841003…

MALICIOUS

PDF

42.6 KB Created: 2020-11-07 13:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5a22ff3a5c5c116357eb47f71bdac2c4 SHA-1: 43df38e66611abeae0a4a8fb7e398a19e68f7567 SHA-256: 6573d6afe9841003d67cbdd01b39e39dec9ad091c259361e49c754b9f287724e
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is designed to lead users to malicious websites. The document body text, though heavily obfuscated, appears to reference a technical issue with a wireless charger, likely as a pretext to encourage clicking the malicious link. No scripts were extracted from this sample, but the presence of a malicious URL and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?keyword=onn+wireless+charger+pad+not+working In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/grim_soul_cheat_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6af3a5-c3a9-440b-9a04-296e0377e0f1/91651372303.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/guitar_chord_progressions_for_beginners.pdfIn PDF document text
    • https://munakuwujeju.files.wordpress.com/2020/11/s4dev_abap_programming_model_on_sap_s_4hana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e332a9-12ff-4b2d-914c-050630d1218b/88364207139.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/zavijedanesire.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pathophysiology_of_cerebral_malaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e450213-b93c-405d-93b3-bd732e8748ca/vexosumupik.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/drug_abuse_among_youth_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/algebra_1_textbook_teacher_s_edition.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_off0000654d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 5516 bytes
SHA-256: 682744fde1f9ca4dc416ff9cd896a14f327c0147068eef7da31d9ead12ea01b3
font_01_sfnt_off00007817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 11052 bytes
SHA-256: 50a6fe736f7db9bdbd27f2858bbc510f475f239e195b467299d5eef750530d8e