Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d580d72ab4c3c3…

MALICIOUS

PDF

51.7 KB Created: 2020-03-27 14:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4611968b2a035ef1f3767555ca8eafa0 SHA-1: 52f79d0d7468e668cff20422a6c0c2de7e7ded43 SHA-256: 02d580d72ab4c3c33afc8b89fdd0f22226ef10808aeb4692f95d08ee3a69a58f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text is garbled, but the presence of numerous URLs suggests a link farm or redirection scheme, likely intended to manipulate search engine rankings or distribute further malicious content.

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://befreetherapy.com/uploads/1/3/0/5/130551262/130551262.html#qu%C3%A9+es+la+definici%C3%B3n+de+especies+end%C3%A9micas+hay+en+baja+california
    • http://brazilnetworkday.nl/uploads/1/3/0/3/130313784/dakifisijanukodi.pdf
    • http://belawtx.com/uploads/1/3/0/7/130775402/50c4220a2.pdf
    • http://greenlitpictures.net/uploads/1/3/0/4/130483338/f3497.pdf
    • http://www.thebecnelreport.com/uploads/1/3/0/5/130543740/dudivibu_tubigiw.pdf
    • http://mosimannlab.com/uploads/1/3/0/2/130272344/4519899.pdf
    • http://diaryofabackpacker.com/uploads/1/3/0/7/130740252/5661911.pdf
    • http://ahnadunnwilder.com/uploads/1/3/0/8/130815664/6963015.pdf
    • http://cpanel.pokebattles.gfx-pro.net/uploads/1/3/0/8/130814534/dumipizijere.pdf
    • http://iwishiwasacloud.com/uploads/1/3/0/6/130604305/1343919.pdf
    • http://davecoconstruction.com/uploads/1/3/0/4/130476185/72f596b7515.pdf
    • http://springbankmedia.com/uploads/1/3/0/8/130813694/tajov.pdf
    • http://soundspellings.xyz/uploads/1/3/0/2/130288643/jizes.pdf
    • http://rvantiques.com/uploads/1/3/0/4/130483494/a09778.pdf
    • http://lauricarrascorealestate.com/uploads/1/3/1/1/131164424/xurafetijokibez.pdf
    • http://verwijdermijnvloer.nl/uploads/1/3/1/1/131164223/tiwulutajane_nejifa_sisufuxav.pdf
    • http://didjbone.com/uploads/1/3/0/4/130483043/249585.pdf
    • http://bellamayphotography.com/uploads/1/3/0/6/130639428/e8dab069c.pdf
    • http://nyclanguageinstitute.com/uploads/1/3/0/6/130639903/d82f66569afb3.pdf
    • http://mickeyinminutes.net/uploads/1/3/0/6/130620209/newatosaremevir_bufizuram.pdf
    • http://mercurebogotabhzonafinanciera.com/uploads/1/3/0/7/130776572/toxulo_nizisemimemamov_venopo_dakixumuxulezer.pdf
    • http://mpoweringpotential.com/uploads/1/3/0/5/130588556/6707684.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fa7.bin
973b959379df7822340281ad57ff9a587dcde591f24a9852c5a92c3360d1e998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA7 9132 bytes
font_01_sfnt_off0000b04b.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB04B 4144 bytes

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