Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0fdab07c44331c…

MALICIOUS

PDF

42.7 KB Created: 2020-11-04 08:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9873c0518e0e035d824451d4caf01f2c SHA-1: 3a92bd622b2c99227e9b0d6002cac32641b1cbd2 SHA-256: 2d0fdab07c44331cb98536257573c1f00299b3e4c74806f01a43bc4942866d99
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm and a redirector, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains text related to a video game and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious sites.

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=how+to+block+on+mortal+kombat+xl In PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/fowezevibik.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/rotisilivalikuxijig.pdfIn PDF document text
    • https://defifipak.weebly.com/uploads/1/3/4/4/134442047/6316773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f89a3add8678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5f941579472ae.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/ketiseweva-nuzopukomus-nalej.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/zelufigav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f9a710a19519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f9fa591bc9c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f9ad32139eb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welutizenop/kubota_l2600_service_manual.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_off00006822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 5092 bytes
SHA-256: 3853f9c1abdd8b2ae116cfd44a1702f877647a3936a124c5101389de5827301e
font_01_sfnt_off0000796d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 10648 bytes
SHA-256: d5fe213727d4228940d93aa42cd6a98cd251b5c6422dc9e273a5424c8887eeca

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