Malicious PDF — malware analysis report

Static analysis result for SHA-256 7574554cd5924357…

MALICIOUS

PDF

42.3 KB Created: 2020-03-21 14:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c6d83cf25335e6a13978885e4cf2e6d0 SHA-1: 8797e7042765e114f6581c8f021ad190a9c697bb SHA-256: 7574554cd5924357bd0f82a905b9c64d3918cf55f6103456b847be25b16bb987
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous URLs indicates a likely attempt to lead users to malicious websites.

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://touchstoneadvisoryconsulting.com/uploads/1/3/0/5/130544240/130544240.html#teoria+de+la+historia+cch
    • http://aransasapparel.com/uploads/1/3/0/7/130776249/4607509.pdf
    • http://www.getonthedrums.com/uploads/1/3/0/4/130489742/gusenunawagili_videnazo_fakorizewedupa_gukagi.pdf
    • http://mail.knocktemplens.ie/uploads/1/3/0/7/130776519/mekuso_fimapizudidomed_levoririp.pdf
    • http://mrfriedliclass.com/uploads/1/3/0/2/130291523/dasof-xesodetusof-judewinawil-kulir.pdf
    • http://www.aquestbegins.prayerknight.com/uploads/1/3/0/5/130550929/furipez_famefeduma_zaluxud.pdf
    • http://mrtoolbelt.info/uploads/1/3/0/7/130739885/xutame-rowenopu-bozafabowedaru-kuxikelonefo.pdf
    • http://affordablevisualconcepts.com/uploads/1/3/0/4/130436180/sojuminizenigav_wasuxin.pdf
    • http://hostmaster.andreavanderlaan.nl/uploads/1/3/0/4/130488338/xikire-tixoxegibi-dakomewurifebow.pdf
    • http://mylioness.com/uploads/1/3/0/3/130379174/5836571.pdf
    • http://www.mapletreemw.com/uploads/1/3/0/4/130435734/doxipilel.pdf
    • http://daisykim.com/uploads/1/3/0/4/130435631/disozowe.pdf
    • http://oneofakindbeauty.com/uploads/1/3/0/6/130639621/9419955.pdf
    • http://www.romanticism5000.org/uploads/1/3/0/6/130639348/69f6b1c2661b93b.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_off0000796e.bin
76228ee82c58789691d9573dd5ca473e21155b8b560c9cfdd42b255c7ef59e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 9316 bytes

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