Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece76d52ee07da2d…

MALICIOUS

PDF

40.3 KB Created: 2020-03-22 03:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0ca10deab69ff2544d08bc701c3794f SHA-1: 051e3f86e8baad661e1922699f09c1df4f4527af SHA-256: ece76d52ee07da2d7b6983fc40fcadad0d56ed0c55048309adfb16994be00eff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, suggesting it was programmatically generated to host these links. The primary intent appears to be directing users to a network of linked domains, likely for malicious purposes.

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://weatherproofguide.com/uploads/1/3/0/5/130550836/130550836.html#distancia+desplazamiento+es+lo+mismo
    • http://kosmosbio.com/uploads/1/3/0/4/130489706/galitelaw_dofudirigekifid_zekomonuber_sogoketusijuz.pdf
    • http://concertsbythecreek.com/uploads/1/3/0/6/130604466/lifisipebokuv.pdf
    • http://boystowntvseries.net/uploads/1/3/0/5/130590666/moloxipurukiwet_satobezebujowu_sapasovux.pdf
    • http://alicecavanagh.ca/uploads/1/3/0/5/130589313/lamekisodijudu.pdf
    • http://folknfurniture.com/uploads/1/3/0/2/130271111/vevidofi.pdf
    • http://chelseafitnessnyc.com/uploads/1/3/0/7/130775842/2389482.pdf
    • http://comedyzoneproject.com/uploads/1/3/0/6/130620159/8701355.pdf
    • http://4riverscenter.com/uploads/1/3/0/6/130620232/bazetof_vimudavedotomi.pdf
    • http://www.latishaowens.com/uploads/1/3/0/5/130550796/2920336.pdf
    • http://globalleader.info/uploads/1/3/0/4/130488701/641a6d.pdf
    • http://poorrichardwest.net/uploads/1/3/0/7/130776487/jijesopama.pdf
    • http://pureexistencedance.org/uploads/1/3/0/8/130814328/dudubipuwevipamon.pdf
    • http://cebport.org/uploads/1/3/0/4/130476344/7095370.pdf
    • http://cts4.com/uploads/1/3/0/5/130590588/pelurufixaxi.pdf
    • http://spearmanbrothersfarm.com/uploads/1/3/0/7/130739488/791719.pdf
    • http://contractorwholesale.com/uploads/1/3/0/6/130621143/91a48fd24.pdf
    • http://citizensformountvernon.com/uploads/1/3/0/6/130621005/2030334.pdf
    • http://kateyanne.com/uploads/1/3/0/7/130776314/1120589.pdf
    • http://jeremysalvatierra.com/uploads/1/3/0/4/130435746/purefun_fewololube_sepowat.pdf
    • http://institutoterravida.org/uploads/1/3/0/2/130272084/tubolezupefaku.pdf
    • http://cleanforetagsstad.com/uploads/1/3/0/7/130739697/wawov.pdf
    • http://www.contractgovernmentservices.com/uploads/1/3/0/4/130435596/6262465.pdf
    • http://cacousin.people.ua.edu/uploads/1/3/0/3/130312996/6ae186.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_off0000738f.bin
01858c1eee1ee90c8bf1481f69fd656352c8a7f5d3a6b9fef56cfe288e72f8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738F 8688 bytes

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