Malicious PDF — malware analysis report

Static analysis result for SHA-256 12eb5cf179d1eefb…

MALICIOUS

PDF

44.4 KB Created: 2020-10-01 06:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ec19dddd75db9234417d7da61a0802d9 SHA-1: 0908effd587d2b552985766fbb01e5fd297112c4 SHA-256: 12eb5cf179d1eefb1ea78ab7baaea6834db52b5147d845c2bf6bd39955dfed50
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to editing PDFs and includes URLs that are part of a link farm. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs suggests an attempt to direct the user to external, potentially harmful, 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://gettraff.ru/strik?keyword=edit+pdf+files+online+without+installing+any+software In PDF document text
    • https://site-1038973.mozfiles.com/files/1038973/bozomuzogegufufuri.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/losoriwiviririmenole.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/tewepolejegedaruvubole.pdfIn PDF document text
    • http://files.wordplayclothingco.com/uploads/1/3/0/7/130739379/a227d4120.pdfIn PDF document text
    • http://gimela.benkiashaninka.com/uploads/1/3/1/4/131407406/3880390.pdfIn PDF document text
    • http://files.macdillbassbusters.com/uploads/1/3/1/4/131406505/lisafelijejef_kasivate_wobumaj.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/1/0439/0912/0152/files/ward_trucking_tracking_ltl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/toyota_corolla_2010_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/79316835622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6325/1622/files/lavebevekar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/20578457288.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_off00006e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 5452 bytes
SHA-256: 4b2f196e670bdf0577125f0e90c14fc04e1923df4df6c9caf048775ae13d207b
font_01_sfnt_off000080ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AC 10560 bytes
SHA-256: b8ee5a974a02a91d4e070650a728864c5661f0ec57465b4ed416b7255223044d

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