Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d63a93f3355f07…

MALICIOUS

PDF

41.0 KB Created: 2020-11-04 14:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1b453d46fd0e5c2344927471ae961f48 SHA-1: efe0db6dd39476c0e39cc59746a63e015d4860e7 SHA-256: 57d63a93f3355f07f607ea4d7966632148507013f91985c42b32ec4c8fa52af0
94 Risk Score

Malware Insights

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

The PDF document contains obfuscated text that includes a URL disguised as a manual download. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this URL points to known malicious infrastructure. The ML classifier also flagged the PDF as malicious. The embedded URL is likely intended to redirect the user to a site that hosts malware or phishing content.

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://gettraff.ru/aws?keyword=power+xl+air+fryer+manual In PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/6722092.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/jiwog.pdfIn PDF document text
    • https://gilawigegazimo.weebly.com/uploads/1/3/4/5/134520665/4556936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_5fa297fa792b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5fa1e31700821.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/6f8a5605-15b6-47b5-9e57-4580b28fe108/4023944413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c98851-faa8-4fec-9feb-729fa1dbc674/undertale_full_version_download_igg.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/35124802241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ba4fef-ab62-4bb7-8e0b-822ede6cf494/41507395173.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/i_saw_her_too_with_lasers_walkthrough_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9124190-6014-4757-93eb-372f65a2bca5/shorts_suit_women_s.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/body_language_hindi_download.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_off000061ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 5000 bytes
SHA-256: d99f9bb4a3130d63a1b1d4633dd729a0a5e799aaf2014c724860a0c1def3269d
font_01_sfnt_off000072b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 10840 bytes
SHA-256: 8cb53d737534708260f5415a78d84d43e7d055a155db18e91c74fa3c196cc551