Malicious PDF — malware analysis report

Static analysis result for SHA-256 1105202ff7905f85…

MALICIOUS

PDF

40.1 KB Created: 2020-03-29 10:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6303d775c13ff219b590be9e2521c748 SHA-1: 8eb4f01872a3e4d17a04bb5bd25a7a46211a38a6 SHA-256: 1105202ff7905f85bc993f3c1fe2646d473ed6f9e766437c1e1667515d1a66a0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or SEO spam campaign, potentially used to distribute malware or phishing content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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://nicolitulk.com.au/uploads/1/3/0/5/130544190/130544190.html#20+ejemplos+de+elementos+qu%C3%ADmicos+compuestos
    • http://mobilemechanicbasildon.com/uploads/1/3/0/9/130969317/486abafdf4.pdf
    • http://www.drchavezcadena.com/uploads/1/3/0/2/130287977/nirafukepixiboluj.pdf
    • http://projectdreamport.info/uploads/1/3/0/8/130813366/3948659.pdf
    • http://cloud-token-info.com/uploads/1/3/0/2/130272577/topewifid-moxekamijunex-totimewekegureg-tezemeto.pdf
    • http://nauticalrabbit.com/uploads/1/3/0/5/130588357/661ad0d11b0a.pdf
    • http://motherdaughterdesigns.com/uploads/1/3/0/8/130874631/5401159.pdf
    • http://bearsvsbabiesgame.org/uploads/1/3/0/8/130814247/babunip-jidojitomabumup-lebowewagivufev.pdf
    • http://beginwithbaby.com/uploads/1/3/0/4/130477131/bikobututowabefejal.pdf
    • http://sunandsandvacation.com/uploads/1/3/0/6/130621325/8506834.pdf
    • http://www.huntersvillenchomerenovations.com/uploads/1/3/0/3/130379673/3477356.pdf
    • http://www.latitudechurch.net/uploads/1/3/0/5/130540823/7641631.pdf
    • http://cousinstwocharters.com/uploads/1/3/1/0/131070158/34dd1c2ac86.pdf
    • http://chriscrawfordstudio.com/uploads/1/3/0/6/130622000/zukimezegadolazib.pdf
    • http://newwavecarpetandtile.com/uploads/1/3/0/6/130604210/168866.pdf
    • http://thedateestate.com/uploads/1/3/0/3/130323154/5020123.pdf
    • http://hackingvirtualization.com/uploads/1/3/0/7/130739362/6386202.pdf
    • http://mmcustomdesigns.com/uploads/1/3/0/3/130323164/rukafu-deduliw-dolor-xebisiboxodos.pdf
    • http://www.indigenous.agency/uploads/1/3/0/7/130776336/jafez.pdf
    • http://winkwinkbeautybar.com/uploads/1/3/0/6/130620946/fiwanebuwilibadi.pdf
    • http://briarmoorpool.com/uploads/1/3/0/2/130289774/5603745.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_off00007283.bin
0d822605fd0c34299baad32fdcf1d317d7b8e86a2457edbbaaba6d0fcaf21598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7283 8324 bytes

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