Malicious PDF — malware analysis report

Static analysis result for SHA-256 b760ea0da8e5f1e5…

MALICIOUS

PDF

35.9 KB Created: 2020-06-16 06:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 45971b3e1bc803548d9b3d6c42c58e6e SHA-1: 27fdcab559574180b455feb1c6e27aa4eda0cc9d SHA-256: b760ea0da8e5f1e50862599e5db4cdc8d84720828dbce4760f736483100ab4cf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic. The document body itself is largely unreadable, but the presence of numerous external URLs indicates a likely attempt to redirect users to potentially malicious content or phishing sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://witchwayiwander.com/uploads/1/3/0/2/130272403/130272403.html#abc+de+las+relaciones+publicas+pdf PDF link annotation
    • http://herbalpetsupplement.com/uploads/1/3/0/2/130272955/1bc8c.pdfIn PDF document text
    • http://redsnail.com/uploads/1/3/0/6/130639841/1158a586db8c.pdfIn PDF document text
    • http://garagedoorrepairsantafesprings-ca.com/uploads/1/3/0/9/130969428/jozoxigad_zusenamama.pdfIn PDF document text
    • http://chrisfurincakes.com/uploads/1/3/0/5/130547728/6666779.pdfIn PDF document text
    • http://moonlightled.ca/uploads/1/3/0/2/130271030/bd61e8c3ec.pdfIn PDF document text
    • http://2zm.undesirable.us/uploads/1/3/0/5/130550910/6938965.pdfIn PDF document text
    • http://1happycruise.com/uploads/1/3/1/3/131379877/cc9f46a4d92d323.pdfIn PDF document text
    • http://shelleymix.com/uploads/1/3/1/3/131384403/jabolijiwofegisewov.pdfIn PDF document text
    • http://mesaccontractorsllc.com/uploads/1/3/0/2/130288448/miloj-mural-widofuzu.pdfIn PDF document text
    • http://clouttrain.net/uploads/1/3/0/7/130775897/seraba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 10268 bytes
SHA-256: bfab17a5ecaebcc7487e0615f6a8105ebafb9231eb05ac47c1f248139493d335