Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee15319ea53de28c…

MALICIOUS

PDF

42.9 KB Created: 2020-03-24 16:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 323aa7d483dfdc897ec3bd5412226559 SHA-1: d1ec5607c09a9e0ebef07df2af01fdd102a5b4b3 SHA-256: ee15319ea53de28c81a638e1509b76aa187240932a2c180ba36137027f87dd33
94 Risk Score

Malware Insights

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

The PDF 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 further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links. No scripts were extracted, and the document body is largely unreadable, making the link farm the primary indicator 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://roadshowarchitects.com/uploads/1/3/0/5/130588216/130588216.html#perfil+de+un+jefe+administrativo-financiero
    • http://suncitytransportation.com/uploads/1/3/0/6/130604314/4633994.pdf
    • http://pavstripmd.solutions/uploads/1/3/0/8/130813797/4698280.pdf
    • http://melissaebbe.com/uploads/1/3/0/6/130604945/fozizonujer-xesixuraso-nejinafanafe-tuzirimanonedi.pdf
    • http://webmail.piastinstitute.org/uploads/1/3/0/5/130547846/3a499f944.pdf
    • http://pgdsoutions.com/uploads/1/3/0/5/130550869/5341727.pdf
    • http://naturecalling.us/uploads/1/3/0/3/130379096/7638224.pdf
    • http://holistichoundstraining.com/uploads/1/3/0/6/130604547/dutojaburigu.pdf
    • http://dysbiz.com/uploads/1/3/0/2/130272275/a30204d830b71.pdf
    • http://travelingtobudapest.com/uploads/1/3/0/4/130488773/50533.pdf
    • http://readthinkwritespeak.com/uploads/1/3/0/3/130312961/rizesugumilij.pdf
    • http://off2grandmashouse.com/uploads/1/3/0/7/130739232/lotifawasime.pdf
    • http://dreamdifferent.net/uploads/1/3/1/0/131070911/6971364.pdf
    • http://www.libertasprof.com/uploads/1/3/1/0/131069968/mobivozukubadinalox.pdf
    • http://macondruglawyer.com/uploads/1/3/0/6/130604869/puluvabezu.pdf
    • http://myulrika.com/uploads/1/3/0/3/130323157/nusisalakagal-zitosiji.pdf
    • http://outsideinning.com/uploads/1/3/1/1/131164352/midetija.pdf
    • http://hartconcierge.com/uploads/1/3/1/0/131071164/6df545.pdf
    • http://bulldogcleaningservice.com/uploads/1/3/1/0/131069763/negetugobegox.pdf
    • http://pixpusher.com/uploads/1/3/0/7/130740571/gufewume_polokadepefofup.pdf
    • http://girlytwirl.com/uploads/1/3/0/5/130588425/ba2ba6f5063.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_off00007b84.bin
91762782f32d99609ec76a6c45fad7638413e6fbf4199f08469fae4f6656ef2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 8972 bytes

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