Malicious PDF — malware analysis report

Static analysis result for SHA-256 84724fdb9301c5d7…

MALICIOUS

PDF

41.9 KB Created: 2020-03-18 18:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ce978266c30ee58ed458c0abf221af62 SHA-1: 133a57e15a032543dd62e97f72bb6429f123b745 SHA-256: 84724fdb9301c5d7d47e2eba0c41193dbc9f62ca49b47349f00a09c1ee4d59ef
94 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The document body, though partially corrupted, contains text suggesting a translation lure, which is a common tactic for phishing or directing users to malicious sites. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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://sockcam.com/uploads/1/3/0/5/130590143/130590143.html#ingeniero+traducir+en+ingles+a+espa%C3%B1ol+gratis
    • http://myotb.org/uploads/1/3/0/5/130588225/34fdd68726802e1.pdf
    • http://michelleleblancshortstories.com/uploads/1/3/0/5/130588468/db42a54f.pdf
    • http://carousellearning.com/uploads/1/3/0/3/130313144/6645141.pdf
    • http://bookinglessons.com/uploads/1/3/0/7/130776025/135482.pdf
    • http://www.lindathelifecoach.com/uploads/1/3/0/7/130775854/xugikukereg.pdf
    • http://www.thephotographersblog.nl/uploads/1/3/0/6/130604081/turabiterimedomadop.pdf
    • http://thecorollashack.com/uploads/1/3/0/7/130740012/mivemiwumomomib.pdf
    • http://richardsonplumb.com/uploads/1/3/0/7/130739204/188538.pdf
    • http://outtashellsoutfitters.store/uploads/1/3/0/3/130379424/wunanub_zunuvef_kugagigiwuvulo.pdf
    • http://hostmaster.toadkingcastings.co.uk/uploads/1/3/0/7/130739087/60527ef79354a.pdf
    • http://youngssoccermaster.com/uploads/1/3/0/4/130476101/6794729.pdf
    • http://acostaexpressserviceinc.com/uploads/1/3/0/6/130605107/d94ffc3568a3c26.pdf
    • http://www.beta.fabrifast.com/uploads/1/3/0/7/130775498/8251035.pdf
    • http://1220productions.com/uploads/1/3/0/6/130640078/c311fedd4a.pdf
    • http://bow-train.com/uploads/1/3/0/3/130323477/vadefufubonivaj.pdf
    • http://www.lovethatsteno.com/uploads/1/3/0/2/130272342/pexomuzog.pdf
    • http://gonewberry.com/uploads/1/3/0/6/130605497/9565165.pdf
    • http://rachaellust.com/uploads/1/3/0/3/130313046/4139169.pdf
    • http://www.payless-vapes.com/uploads/1/3/0/7/130775217/tufuruzuse_zixamopolotum_ravezixem.pdf
    • http://www.markvalencia.com/uploads/1/3/0/9/130969065/2796545.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_off0000761a.bin
36f02deb14b44c35be97ae0108de00b07ef89e834cff6f4c38298b514b559e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 9232 bytes

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