Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a572a67778c33a1…

MALICIOUS

PDF

29.9 KB Created: 2020-05-15 07:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9eb3e8b005a9587ee171d78d7e9c4ed SHA-1: 0f52da1738183a455691fda1ccb782503a649fb1 SHA-256: 4a572a67778c33a12b66b926cc631aaa83496b3683acfe8f6e29e357b4e15172
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, which could lead to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://caffelina.com/uploads/1/3/0/7/130739452/130739452.html#bis+full+form+in+english
    • http://slipperyscents.com/uploads/1/3/0/4/130476493/gozebeto.pdf
    • http://littleriverpcs.com/uploads/1/3/1/4/131438142/4095160.pdf
    • http://trippylashes.com/uploads/1/3/0/2/130291438/pitex_bokipixeli_woferulubozip_dexowa.pdf
    • http://sekolahberpikirindonesia.com/uploads/1/3/0/4/130477083/kizute.pdf
    • http://motwh.org/uploads/1/3/0/5/130550835/71b39b56a3.pdf
    • http://sultanalthani.com/uploads/1/3/1/6/131606089/tinapagarunowu.pdf
    • http://wmfws.com/uploads/1/3/0/3/130323894/e96cb1a.pdf
    • http://theacollection.org/uploads/1/3/0/2/130289222/6852700.pdf
    • http://corporatereportcard.com/uploads/1/3/0/2/130287815/gaxivagulap.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000509d.bin
1040e6d750df06a6110f43bb9948c191d869624cec708dae386f6ca0bb726007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x509D 10612 bytes

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