Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0c895582c8479d…

MALICIOUS

PDF

37.8 KB Created: 2020-03-12 10:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c56551fa0176df27117e54454169aa32 SHA-1: 1eaba4c2050b2e4f2c18f5ea0b15244c2a081867 SHA-256: cc0c895582c8479d8de10440c0215bf593763e8257f33eb736eca29410e0fced
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to various domains, a technique often used for SEO manipulation or to distribute malicious payloads. The ML classifier strongly indicated maliciousness. The embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the presence of a link farm, suggesting the document's primary purpose is to redirect users to potentially harmful content hosted across numerous sites.

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://yjopg.bpmtc.com/uploads/1/3/0/8/130814579/130814579.html#sony+alpha+a5100+sample+images
    • http://droscarparada.com/uploads/1/3/0/7/130776049/jamoref_diredujikam_ribetav_neruforanevobam.pdf
    • http://pressurewashinghollywood.com/uploads/1/3/0/4/130494059/wunuvijaxoxe-biwukokivitoj-jiwajajuvegusi.pdf
    • http://newyorkreadingsuccess.com/uploads/1/3/0/7/130775107/8349332.pdf
    • http://leenacroft.com/uploads/1/3/0/2/130287548/a652a12e7c3.pdf
    • http://objectrelationsrecords.com/uploads/1/3/0/6/130639266/9ff0b.pdf
    • http://timecharm.com/uploads/1/3/0/6/130603696/pejexurelu.pdf
    • http://oarkridgefarmsonline.com/uploads/1/3/0/4/130476976/jevegisikufodexul.pdf
    • http://dtdealer.com/uploads/1/3/0/5/130588740/kabirawomav-rusapiloke.pdf
    • http://www.marketingmab.com/uploads/1/3/0/7/130740212/julefezumoj.pdf
    • http://www.bullardpatent.com/uploads/1/3/0/6/130621484/2818822.pdf
    • http://dannydorito.com/uploads/1/3/0/9/130969558/840fc5131.pdf
    • http://ibhpalmsprings.com/uploads/1/3/0/2/130271206/2472662.pdf
    • http://www.ondecksports.com.au/uploads/1/3/0/4/130488621/2e21da8d1d037.pdf
    • http://lift4life.com/uploads/1/3/0/8/130874246/2dddf24.pdf
    • http://www.rblack.co.uk/uploads/1/3/0/9/130969722/muxigi.pdf
    • http://kubecon-demo.octarinesec.com/uploads/1/3/0/3/130324416/4401489.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_off00006931.bin
6d8b6710f0eb7162f4153b37be3d5359c41d583b8371480bbb475e1ea315556b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 8040 bytes

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