Malicious PDF — malware analysis report

Static analysis result for SHA-256 76066f9c3999c64a…

MALICIOUS

PDF

37.3 KB Created: 2020-10-03 13:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e9fcae6063c45e2a212d01e3090ca0f SHA-1: 664e60e968231be4f074769a91cd302ec71d6eb3 SHA-256: 76066f9c3999c64af5a5cd6f32658864642f4697934342710048dec56399750f
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a free PDF download, which likely leads to the malicious infrastructure. The presence of many external links indicates a link farm or SEO poisoning attempt to distribute malicious content.

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=the+lord+of+opium+pdf+free In PDF document text
    • http://files.komyoreikidonewyork.com/uploads/1/3/1/3/131380564/ece35.pdfIn PDF document text
    • http://bisasoz.funkytownculture.com/uploads/1/3/0/7/130739090/6bd1c72f5.pdfIn PDF document text
    • http://petuzuju.sazacs.org/uploads/1/3/1/4/131407164/4e1a8948b7.pdfIn PDF document text
    • http://faxud.istanbulsanatlayasam.org/uploads/1/3/1/4/131454215/855119.pdfIn PDF document text
    • http://files.lisawatermangray.com/uploads/1/3/1/4/131453136/b8b7551399ce4.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/27085815487.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/vejotigefojatekilowinulal.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/1/0484/9241/3090/files/44920879061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/wevatuzexapirod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/puzalalawokunubodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4610/3961/files/1755410784.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_off000055d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D4 4840 bytes
SHA-256: 918bd78ed5f7f47695bcc77fde34b6e185f2dc74b0b1ceae18e2e8c78c77f17f
font_01_sfnt_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 10212 bytes
SHA-256: e40a01e48874105b23502279eaa4cdb996c98ac94e7aa1f5d98cc279312d843e

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