Malicious PDF — malware analysis report

Static analysis result for SHA-256 187e56f0df319646…

MALICIOUS

PDF

41.3 KB Created: 2020-03-10 11:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8b05c20b7a3d7dfc9322830ba14a1629 SHA-1: 54983e8ace3ca97a7d2e41dba9a562419c80ffad SHA-256: 187e56f0df319646d6bb46ad1e5ea3a04081b151d1fd4390aef95b0ca0e325ce
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests an attempt to redirect the user to potentially harmful sites. No scripts were extracted, but the structure and heuristics point to a malicious PDF designed to lead users to other resources.

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://southernbijoux.com/uploads/1/3/0/3/130324207/130324207.html#inverted+yield+curve+chart+2007
    • http://spicysnack.com/uploads/1/3/0/5/130550756/f3bd615872f.pdf
    • http://matfawcettcomputerrepairs.com/uploads/1/3/0/7/130775668/keneduwasamose.pdf
    • http://oemmeservice.com/uploads/1/3/0/3/130313390/be97d50e695f44.pdf
    • http://quinnshields.net/uploads/1/3/0/7/130740625/porupofojeta.pdf
    • http://whatsyourstorybylaurencem.com/uploads/1/3/0/7/130775201/bodamenat.pdf
    • http://mail.hrarbeidsvoorwaardencongres.nl/uploads/1/3/0/5/130546759/7690194.pdf
    • http://www.coderedpicturecompany.com/uploads/1/3/0/3/130323542/41be15.pdf
    • http://www.vrcreate.co.uk/uploads/1/3/0/8/130874260/bomadesolur-tebomug.pdf
    • http://knightdale-computer-repair.net/uploads/1/3/0/8/130814173/fogamutuvediz.pdf
    • http://www.skpowerwashing.com/uploads/1/3/0/6/130640053/2531211.pdf
    • http://beatysoberhouse.com/uploads/1/3/0/6/130604537/ravokag.pdf
    • http://lehighvalleyweddingchapel.com/uploads/1/3/0/7/130776841/d5416b78e.pdf
    • http://regiond.swe.org/uploads/1/3/0/3/130324158/xereres_wowulu.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066b4.bin
069a9425fc0a8b8e8141c8a376b62210fd8a6bea455c4a6a92ecef90ae7ec00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B4 7380 bytes
font_01_sfnt_off00008383.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8383 16036 bytes

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