Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35d93ff272faaa6…

MALICIOUS

PDF

47.8 KB Created: 2020-06-17 02:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7e4485c84a332b2fdf72dd944844b60 SHA-1: 82b1d951b2a5f4bd329fc5fcfe601e7c64f7459d SHA-256: b35d93ff272faaa666366b4cebca97cfb3a38b52df47a515a45bfdd3a61290e4
92 Risk Score

Malware Insights

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

The PDF file 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 redirection scheme. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The document body contains text related to exercise equipment and application metadata, which appears to be a lure to disguise the malicious nature of the PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://makeupgenies.com/uploads/1/3/1/3/131381078/131381078.html#hest+exercise+equipment
    • http://twilio.onereach.com/uploads/1/3/1/6/131606762/muwirigiruna.pdf
    • http://septemberfashionmag.com/uploads/1/3/0/5/130589279/jugolumowuzo-befivezuzirav-lezelobogape-riwowimarev.pdf
    • http://49.undesirable.us/uploads/1/3/0/2/130272281/13068baf034f.pdf
    • http://markinthemiddle.org/uploads/1/3/0/2/130288316/webisonova-nimibapevo.pdf
    • http://jonescemeteryatx.org/uploads/1/3/0/7/130739778/nebisabikepejipi.pdf
    • http://mail.smartonlineacademy.com/uploads/1/3/1/6/131606864/nomefikibogumof.pdf
    • http://cherierneal.com/uploads/1/3/0/7/130739212/8e7f99ed.pdf
    • http://lightmatter.eu/uploads/1/3/1/3/131398574/9607704.pdf
    • http://onestopshopentertainment.net/uploads/1/3/0/7/130775186/65a446132b460.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_off00007e21.bin
47819f9ec6ef87ade6f31f766c0fb2ad977f460287322ba289813e155dd6a766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E21 4764 bytes
font_01_sfnt_off00008e3f.bin
d5994e989fc92bc18341cbe3b8611e428fd10798711975532c6d4c398a87de2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3F 10836 bytes

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