Malicious PDF — malware analysis report

Static analysis result for SHA-256 a959b20334f4aec6…

MALICIOUS

PDF

42.4 KB Created: 2020-04-01 12:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 31d7a28cec98d1e34cc8359003cae1b7 SHA-1: f7b50b9ceb25e3b9bcf0ca191e1aa86a31fca16d SHA-256: a959b20334f4aec6dd2796f7156d2eb95ff0b02ccd75c36a4e67e16ff6502b89
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 User Execution

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the link farm. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload or intent beyond the link distribution.

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://gotoursandholiday.com/uploads/1/3/0/5/130551270/130551270.html#tipos+de+sucesiones+numericas+pdf
    • http://joyce-spiro.com/uploads/1/3/1/3/131383380/3029267.pdf
    • http://blackfridayvape.com/uploads/1/3/1/4/131407227/tuvuworor_nujiz_selowo.pdf
    • http://frenchbulldogs.love/uploads/1/3/0/6/130604388/volejutopedobobisoma.pdf
    • http://tjentcorp.com/uploads/1/3/0/4/130489157/1958228.pdf
    • http://alexandertechnik-itm.com/uploads/1/3/0/5/130589429/6ebae.pdf
    • http://succourfoundationsetx.org/uploads/1/3/0/9/130969754/8cb50bc99.pdf
    • http://jujumikeups.com/uploads/1/3/0/6/130604397/7179002.pdf
    • http://myinclusiveclassroom.com/uploads/1/3/0/4/130483963/e4c394fa8b.pdf
    • http://myjandj.com/uploads/1/3/0/6/130604286/tewadej.pdf
    • http://cavaticamedia.com/uploads/1/3/0/3/130379111/5f8b4.pdf
    • http://bonifieldfinancial.com/uploads/1/3/0/8/130814510/04ae870f.pdf
    • http://kovite.net/uploads/1/3/0/7/130775978/woxiwibowig-dajew.pdf
    • http://manysandsyoga.com/uploads/1/3/0/7/130739341/3413559.pdf
    • http://experienceperigord.com/uploads/1/3/0/9/130969190/8602485.pdf
    • http://lideresindustriales.com/uploads/1/3/0/7/130775145/d9012475c7.pdf
    • http://ecolecobaux.be/uploads/1/3/0/5/130588225/pepiwetuxajaf-faramaf-suwulunatelov.pdf
    • http://crossimports.net/uploads/1/3/0/6/130605498/kabamavuwo.pdf
    • http://leaderbooster.com/uploads/1/3/0/5/130543552/76ad71366a.pdf
    • http://jandwrestaurants.com/uploads/1/3/0/4/130488357/8326450.pdf
    • http://sealiongallery.com/uploads/1/3/0/8/130813904/dotenugugumole-xijeje-retoxawet.pdf
    • http://henbro-bakes.com/uploads/1/3/0/6/130604982/96ae95012fde02f.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_off000075db.bin
9d7f83d340d4879f4c7f4829db9a846d686cc33dbed0dd5f875c741edc5e01d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 10152 bytes

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