Malicious PDF — malware analysis report

Static analysis result for SHA-256 e539936946ad4d03…

MALICIOUS

PDF

37.4 KB Created: 2020-04-02 08:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ad96bb2cd3b07f58db0616e50ca1c9f SHA-1: e10f892325accad62699b74a4721328b9e4f392e SHA-256: e539936946ad4d038575339529c2ed74fc9567fbc0fba58b1f3d022f1f520eee
152 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The ClamAV detection as Pdf.Dropper.Agent-9219730-0 further supports its malicious nature. No scripts were extracted from this sample.

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.
  • ClamAV: Pdf.Dropper.Agent-9219730-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9219730-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://alyssabrewer.org/uploads/1/3/0/4/130489038/130489038.html#que+es+potencial+humano+ejemplos
    • http://sos-brand.com/uploads/1/3/0/7/130776403/4298023.pdf
    • http://fitzshomeinspections.com/uploads/1/3/0/5/130542829/xixajupusa.pdf
    • http://katobikewalk.org/uploads/1/3/0/8/130813866/125d9cf13c16.pdf
    • http://farmsteadfruits.com/uploads/1/3/0/5/130541209/buliziwu_tefukaxewolelab_sewepiwuxoxudo_dukoxiw.pdf
    • http://onlinecondooms.nl/uploads/1/3/0/7/130776874/6003419.pdf
    • http://newsmapper.org/uploads/1/3/1/3/131380589/guxotonapidepov-zidovosalule-ruzejemigukosa.pdf
    • http://kathrin-schaefer.de/uploads/1/3/0/7/130740573/9237924.pdf
    • http://dmctechnologyconsulting.com/uploads/1/3/0/6/130621052/3140660.pdf
    • http://publicationorganizer.com/uploads/1/3/0/9/130969539/1fd175fd251.pdf
    • http://vidafitnessparis.fr/uploads/1/3/0/2/130274267/5d2303.pdf
    • http://homegrowntextiles.net/uploads/1/3/0/5/130542727/62d626c3b0.pdf
    • http://edclarkesound.com/uploads/1/3/0/4/130435569/3767877.pdf
    • http://shop-otc.co/uploads/1/3/0/6/130604552/7941203.pdf
    • http://fineviolinflorida.com/uploads/1/3/0/5/130590334/4704853.pdf
    • http://fonmeadow.com/uploads/1/3/0/5/130588502/zimikudagisa.pdf
    • http://moonlightllamas.com/uploads/1/3/0/4/130490833/6856539.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_off0000691e.bin
7d6290b091f9169a201efc2f15e3d255313b525279ad588186c9248c8d0879e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 8148 bytes

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