Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eab299829f4da5a…

MALICIOUS

PDF

42.0 KB Created: 2020-09-30 13:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0aa9541e7fbeafd1b84619738d6c1dc7 SHA-1: c6754b52d922a3d03346287513589cc3dd694db9 SHA-256: 0eab299829f4da5ad3ab81bba37f0f776b8e07b9e2476dcae9c7b08799596df8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to attract traffic. The presence of a malicious redirector and a large number of external links strongly suggests an attempt to direct users to harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=artificial+intelligence+and+expert+system+tutorial+pdf In PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/badivadikibawipam.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/sesen.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/41161885585.pdfIn PDF document text
    • https://site-1038691.mozfiles.com/files/1038691/17934446232.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/61538381155.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/jerabidajosalo.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/dinij.pdfIn PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/11686957544.pdfIn PDF document text
    • https://site-1036716.mozfiles.com/files/1036716/57063491233.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/lepexetebenefovipexuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/nosen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6434/7809/files/explosion_box_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/best_man_speech_template_dad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.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_off000064e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 5636 bytes
SHA-256: 132cde8f958eb601dae297f02cab3aafd35e101b143af770acfafbfa8a8f6fd2
font_01_sfnt_off0000780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 10056 bytes
SHA-256: 1f3735f01e822f825a3244e3e3ff4452373ed465faa1a215813f62be05a9c102

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