Malicious PDF — malware analysis report

Static analysis result for SHA-256 67764e412c823ef6…

MALICIOUS

PDF

47.4 KB Created: 2020-11-03 12:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f295d39610c302e96b77da3d7c116df7 SHA-1: 120e3e309b899cc025172e8ddfb6e77b4f754efd SHA-256: 67764e412c823ef61f1245e21936a81d8b428a3f6b4fcedd222cb71b33ee6051
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious infrastructure. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to mimic an invoice or payment request, further encouraging user interaction with the malicious link. The ML classifier strongly flags this PDF as malicious, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=answer+phone+call+with+alexa
    • https://zuxobopabure.weebly.com/uploads/1/3/4/3/134344154/sewiwiwali.pdf
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/gezuvalef.pdf
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/2c4d7f.pdf
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/taxowisix.pdf
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/9bca9806b74.pdf
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/41faf95d84.pdf
    • https://melukibe.weebly.com/uploads/1/3/0/8/130873851/2e29a6b8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/be0aaf0f-e654-45c6-9dbc-91c76fc8f020/44303181586.pdf
    • https://s3.amazonaws.com/ruzumeb/4490370296.pdf
    • https://s3.amazonaws.com/zafaronivaj/mexonalijubibizeta.pdf
    • https://uploads.strikinglycdn.com/files/83fcac38-7d7c-480d-8084-941e725efe1c/12648355617.pdf
    • https://uploads.strikinglycdn.com/files/9bf8d3df-1f25-49a0-863d-7e32a8576bf0/213130041.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_off000078d0.bin
d6be0de0f58d7a1d35c721f6fd43401a6d906f5206a252dbd5c65dc414f63209
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D0 5168 bytes
font_01_sfnt_off00008a78.bin
efd72a2a3da4108abc77a17a7ec71a6307acce469dd960bb394ad2b390eefb55
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 11208 bytes