Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca44010343f5534f…

MALICIOUS

PDF

43.3 KB Created: 2020-03-23 14:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: efa322dafe7034d23eea33715505276f SHA-1: 66d751a2f1b5080982f54195cc229a6d79eee35c SHA-256: ca44010343f5534fff5c85367d0bfbbfea2464b1a0d3918994cfdf7866cf39e6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its body. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were extracted, the sheer volume and nature of the embedded URLs point towards a malicious intent, likely for SEO poisoning or redirection to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://theclassyandjazzyboutique.com/uploads/1/3/0/9/130969600/130969600.html#schwinn+700c+women%27s+admiral+reviews
    • http://hostmaster.chicoareaflyfishers.org/uploads/1/3/0/7/130738975/7afa5eaafc90.pdf
    • http://thecryptojack.com/uploads/1/3/0/4/130488198/7980193.pdf
    • http://www.techheroesbloomington.com/uploads/1/3/0/7/130776275/padib.pdf
    • http://galvestonbayfishingshow.com/uploads/1/3/0/5/130589277/rakutokisofanojepa.pdf
    • http://smallstuff.info/uploads/1/3/0/2/130287441/jalelexavubisenalose.pdf
    • http://www.olgatodo.com/uploads/1/3/0/5/130545097/gedada.pdf
    • http://stevenmcarey.com/uploads/1/3/1/1/131164009/cb08f28.pdf
    • http://businesspartnerwithjessica.com/uploads/1/3/0/8/130814195/fidanasokax_jabefezokevigul_gunigamezaneko.pdf
    • http://colombus.store/uploads/1/3/0/6/130640191/ce427dd.pdf
    • http://alimark.com/uploads/1/3/0/5/130543488/d265c.pdf
    • http://nj-css.com/uploads/1/3/0/2/130271004/rigelebe.pdf
    • http://sureadjust.net/uploads/1/3/0/8/130873717/48791ac60b177e3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691a.bin
4a8bcf8e3bd1a2edb400a782389be4d12a799894800fa81b69dd4fd0951782c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691A 8216 bytes
font_01_sfnt_off000088c4.bin
5b3a51cc259a99f1ba986ff48994f28c09ea4c39fa0390a127dcc1dc8faddff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C4 16072 bytes

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