Malicious PDF — malware analysis report

Static analysis result for SHA-256 eece7d51ee562292…

MALICIOUS

PDF

35.7 KB Created: 2020-06-04 01:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2cb46ffdd9d2380e851dde688ccbeca SHA-1: d3ceefbee55ace04ec692119eb1da88d41d0e53f SHA-256: eece7d51ee562292b21eaca3b65dbf01689fa93b499be2c9533e96806fa08a94
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which are likely intended to direct users to malicious websites. The document body, though obfuscated, suggests a 'bill of sale' lure. The ML classifier strongly indicated maliciousness. The primary attack pattern involves a link farm designed to trick users into visiting potentially harmful sites.

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://busybuddhacoaching.com/uploads/1/3/1/3/131380786/131380786.html#trailer+bill+of+sale+pdf
    • http://mail.songbugs.com/uploads/1/3/0/2/130272462/47cfff22.pdf
    • http://mueblesjj.com/uploads/1/3/0/8/130874468/9980571.pdf
    • http://boxinyulechengdaili.br3h.com/uploads/1/3/0/5/130540063/dowisafogujuvixusola.pdf
    • http://atong227.com/uploads/1/3/0/8/130814666/bawovul.pdf
    • http://webdisk.farobankcreative.com/uploads/1/3/0/2/130289332/5439583.pdf
    • http://agofaction.com/uploads/1/3/0/7/130775215/ligosasibujab-bajoneruwepane-jesusiwazuvoda-rokivasofe.pdf
    • http://soundmindcounselling.com.au/uploads/1/3/0/2/130288798/lanaminifu.pdf
    • http://doyogawithchelsea.com/uploads/1/3/1/3/131378930/5924331.pdf
    • http://busybuddhacoaching.com/uploads/1/3/1/3/131380786/terms.html
    • http://busybuddhacoaching.com/uploads/1/3/1/3/131380786/dmca.html
    • http://busybuddhacoaching.com/uploads/1/3/1/3/131380786/policy.html
    • https://kilotudinuv.files.wordpress.com/2020/06/pixitewuwurewexijukipos.pdf
    • https://bakovuder.files.wordpress.com/2020/06/82044551536.pdf
    • https://sunewizev.files.wordpress.com/2020/06/xawatak.pdf
    • https://ragadij.files.wordpress.com/2020/06/jukemegoxewudo.pdf
    • https://metudavev.files.wordpress.com/2020/06/3422457408.pdf
    • https://gijatok.files.wordpress.com/2020/06/30480188159.pdf
    • https://dugejajaz.files.wordpress.com/2020/06/dikogobuberamibikeje.pdf
    • https://vubagojexub.files.wordpress.com/2020/06/kofivorokixesotuteda.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b1.bin
fb2bd9bbda4ff86c6cf54eac02f4f62f704812c6c62e7d2186572277bca977bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 9560 bytes