Malicious PDF — malware analysis report

Static analysis result for SHA-256 72982064552a36bf…

MALICIOUS

PDF

38.5 KB Created: 2020-05-20 05:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deefcb768f73f1bea60da3e3e97572c4 SHA-1: 9563b568cd683970688fe4afc5cfca45c73af841 SHA-256: 72982064552a36bff0cd3eb98c41ea62bd1f7580e75fafe5dfb93187bcf8b283
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking pattern.

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://andmerchant.org/uploads/1/3/1/6/131636772/131636772.html#manual+de+redaccion+pdf
    • http://francois-visage.eu/uploads/1/3/0/6/130639672/2637822.pdf
    • http://gosiasart.com/uploads/1/3/0/4/130483858/2756072.pdf
    • http://theravenousreader.com/uploads/1/3/0/7/130776720/pogirenidowagag_xemebupelififo_nukira_jadiwujabar.pdf
    • http://chefpetermilano.com/uploads/1/3/0/2/130288579/poviwol_wanini_rorineponoja.pdf
    • http://whitemountainsweddings.com/uploads/1/3/1/4/131438019/tolavuxil.pdf
    • http://myqualityassurance.net/uploads/1/3/1/1/131163540/611b993647df80.pdf
    • http://majesticstrandscollection.com/uploads/1/3/0/8/130814219/5e4773171624808.pdf
    • http://thefalmouthoktoberfest.com/uploads/1/3/0/8/130874097/lagufexarejofe-vadaxo-pifuj-wabipija.pdf
    • http://houseofwolvesonthefly.com/uploads/1/3/0/6/130605476/a709c952fccdd47.pdf
    • http://vegasauctionsolutions.com/uploads/1/3/0/4/130476370/6132245.pdf
    • http://aag2010.com/uploads/1/3/0/7/130738740/0c9e11c96bf8.pdf
    • http://petropoint.net/uploads/1/3/0/4/130494801/fororego.pdf
    • http://atlantichealths.org/uploads/1/3/1/4/131409909/31caacac90fa19.pdf
    • http://terrielbaum.com/uploads/1/3/0/2/130272477/3142206.pdf
    • http://ocdorganiccleaningdetailing.com/uploads/1/3/0/9/130969699/2991462.pdf
    • http://eternitymobile.com/uploads/1/3/0/7/130738482/8c730.pdf
    • http://fineconsignhickory.net/uploads/1/3/1/6/131637276/xolovabodiro_wunap_lozer_tusajupajo.pdf
    • http://printable-ebooks.com/uploads/1/3/1/4/131406925/jifoduxitoxij.pdf
    • http://walshrenovationsllc.com/uploads/1/3/0/7/130739773/bipezef.pdf
    • http://sophiaahmedsattar.com/uploads/1/3/0/6/130639418/bbef995094.pdf
    • http://okeedan.com/uploads/1/3/0/6/130639599/wodutufigagepaz.pdf
    • http://uniqueindeed.com/uploads/1/3/0/2/130289629/weroret.pdf
    • http://debbragouldmedicalmassage.com/uploads/1/3/1/4/131437876/farevesowopikubozot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a2a.bin
dd20b2ee257b919e98af59c4134528a86a5f8e431866c6cb102da236fe90810c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 11104 bytes

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