Malicious PDF — malware analysis report

Static analysis result for SHA-256 563946d6b4163b44…

MALICIOUS

PDF

39.1 KB Created: 2020-11-05 06:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af68a87cab46b90da319c49be7955cde SHA-1: 5e8dada45d2a69fb46f43a48409e1253150f68c5 SHA-256: 563946d6b4163b44e1b51fd17c59939f467240c0a594e273fd78f5050c829043
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URL is a strong indicator 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/strik?keyword=last+stand+2+unblocked+game
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f986ad51cc7f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/89437be3-bb0d-446d-b456-5a93bf939c18/80177569374.pdf
    • https://cdn.shopify.com/s/files/1/0504/7995/6148/files/formal_syntax_and_semantics_of_java.pdf
    • https://s3.amazonaws.com/henghuili-files2/fekajozokebuzedegusup.pdf
    • https://s3.amazonaws.com/nagev/scientific_notation_free_practice_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/5fdff7f9-942b-4f49-ae06-79a60d2651c6/97082587735.pdf
    • https://uploads.strikinglycdn.com/files/37152dc9-a45d-481c-b888-789be34f93a1/jiluzutidigomipatazuze.pdf
    • https://cdn.shopify.com/s/files/1/0480/8340/2909/files/cbse_2020_date_sheet_class_12.pdf
    • https://s3.amazonaws.com/henghuili-files/23932101064.pdf
    • https://uploads.strikinglycdn.com/files/96dbc348-32d4-4d63-bfe6-eb512892e444/23472911391.pdf
    • https://uploads.strikinglycdn.com/files/288c87f6-aeab-4d73-abe2-067190fb0803/vimegopigabezoxusozojigax.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3a.bin
bcb2359ee31f9bc2000ce3e2b54f484b73e93acbe285990c48b412fddd510273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3A 5440 bytes
font_01_sfnt_off00006db1.bin
2a089802782530d6e165bd05222ea1b2f5d905a48b72f16f894d4e64505b6f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB1 10048 bytes

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