Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfbda8dad52cc96…

MALICIOUS

PDF

54.2 KB Created: 2020-03-28 02:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 837e2a58e632822b211aedebad5e76f1 SHA-1: 60aafc9a746a051a9469b1ccf6a8599bfee5e5c4 SHA-256: 0bfbda8dad52cc96b466ce9f5e86fa1a276374fbe9bd49f60d270d3fc7c03af5
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious payloads. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content hosted on numerous domains.

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://eutechsales.com/uploads/1/3/0/8/130874205/130874205.html#neumonia+por+streptococcus+pneumoniae+en+ni%C3%B1os
    • http://richlandrealestateblog.net/uploads/1/3/0/6/130621682/1909109.pdf
    • http://perfectlyimperfectgifts.com/uploads/1/3/0/5/130550936/futove.pdf
    • http://shopsweetcorazon.com/uploads/1/3/0/6/130639578/dibus.pdf
    • http://www.beertheexperience.com/uploads/1/3/0/4/130476548/zavusejejivez.pdf
    • http://battlegaregga.com/uploads/1/3/0/8/130874086/6306307.pdf
    • http://zziggy.com/uploads/1/3/0/6/130620573/zekerirate_kotojopa.pdf
    • http://carriersband.com/uploads/1/3/0/7/130739567/rolamabasizo.pdf
    • http://shhmeeze.com/uploads/1/3/0/6/130604333/c2530c1bbe8148.pdf
    • http://illuminatedflowers.com/uploads/1/3/0/6/130605438/wunaritika.pdf
    • http://www.theclubhousepeoria.com/uploads/1/3/0/6/130603748/nulufejipujowo_dakami_gutezubonivanix.pdf
    • http://www.downtownhaliburton.ca/uploads/1/3/0/6/130603860/gekoron-jezopedetuvavo.pdf
    • http://the3millefioris.com/uploads/1/3/0/4/130479513/mitikopolo_bobuvexex_tiwurofakarene.pdf
    • http://www.hangergames.com/uploads/1/3/0/6/130604495/zujulogivukagij-zekosoro-kewapin.pdf
    • http://samia-noor.com/uploads/1/3/0/9/130969904/5572612.pdf
    • http://mail.meridianquinn.com/uploads/1/3/0/5/130545128/divixus.pdf
    • http://air4you.nz/uploads/1/3/0/6/130604788/goxugitejagifod.pdf
    • http://adentaaustralia.com/uploads/1/3/0/4/130475932/1097853.pdf
    • http://tomsalf.store/uploads/1/3/0/2/130289652/gufitojerewufigi.pdf
    • http://ludvigbua.net/uploads/1/3/0/6/130604198/xapanip-bikinativo.pdf
    • http://www.iniflashndefense.com/uploads/1/3/0/5/130539131/ximilaxedudeb.pdf
    • http://www.myhomesolutionsservices.com/uploads/1/3/0/5/130542922/japapimodeguf.pdf
    • http://shop.faultlessfitness.com/uploads/1/3/0/8/130874012/3496667.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_off0000a912.bin
6f7a23773f573f3bbd50833c38795d40fb2caf9e1babce47aa778cb72b54a0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA912 8496 bytes

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