Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ee59d608fa2fd0…

MALICIOUS

PDF

74.4 KB Created: 2020-11-11 23:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fe4b99cbb7211b8b3e99e9e19b60ec97 SHA-1: 524f740f6437ab04f077b29bd137f001055fcf9a SHA-256: a6ee59d608fa2fd0898c24b8105140945d2a324a46f4448eb7c8fcad93cbe367
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain text related to song lyrics, suggesting a lure to disguise the malicious links. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirm the intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=the+girl+from+ipanema+lyrics+portuguese+translation In PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/rexelotevar.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_5fa82a21c41bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5faa15a12a554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5fa4c61e8a1d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_5fabaa2b4193a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f87399df0c7d.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/konig-bisafosoku-mipebeka.pdfIn PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/jexizikex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406466/normal_5fa9fd4b9c378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8beed7379ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fa48703778a2.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f8e875994059.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/potevip/blank_ukulele_chord_chart.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_off0000df56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF56 5480 bytes
SHA-256: dcfea6d381827b4fccc63e792344bb0fb20eda0f1d931546a2b32d576109d4cc
font_01_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 14064 bytes
SHA-256: ced2b1991c16f8f0582a09657ebd1fd882ee531f43beeb4522d716d9584408cf

Open this report in the interactive analyzer, or submit your own file for analysis.