Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f89ab38105568e0…

MALICIOUS

PDF

65.6 KB Created: 2020-03-09 07:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c3d872dce6177a3c2845e876c6a93c2b SHA-1: c9f30da1c669dc167fa7b6f55dfcddbf36ae716f SHA-256: 6f89ab38105568e0d814c0f95cca5fb11b6716b638319d4f387a95032e9e10c2
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which point to external PDF files. The document body, though partially corrupted, contains a URL that is also present in the heuristics. This suggests a tactic to drive traffic to malicious content, potentially for SEO manipulation or malware distribution. No scripts were extracted, but the extensive link farm indicates a high likelihood of 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://vps20.pleasingfood.com/uploads/1/3/0/7/130738805/130738805.html#adrenal+insufficiency+due+to+steroids+icd+10
    • http://600bst.com/uploads/1/3/0/5/130588382/f2560c.pdf
    • http://patriotplayerstheatre.com/uploads/1/3/0/5/130588822/8535189.pdf
    • http://pintsizechef.com/uploads/1/3/0/5/130589276/rutekepeg-redodigilevexo-rorem.pdf
    • http://www.lakeshconcept.com/uploads/1/3/0/7/130740497/7272173.pdf
    • http://www.lakefieldbaptistchurch.org/uploads/1/3/0/5/130540214/tukulavakunuj.pdf
    • http://browngreasefuel.com/uploads/1/3/0/6/130620882/1044997.pdf
    • http://trailofhumanity.com/uploads/1/3/0/3/130323552/2535567.pdf
    • http://tempelcare.nl/uploads/1/3/0/2/130287291/tokezatusegurubu.pdf
    • http://priyabery.com/uploads/1/3/0/7/130776358/5816651.pdf
    • http://milestoneco.net/uploads/1/3/0/6/130621353/kuvakubawifizak_pegitamalugubi_xerebutupopuli_razibumaw.pdf
    • http://nariknektalov.com/uploads/1/3/0/3/130313429/mabezan-tawabapanox.pdf
    • http://missionbeachaustralia.com/uploads/1/3/0/7/130740607/lozog.pdf
    • http://ownyourlinemtb.com/uploads/1/3/0/7/130739596/gegikukudubibazeg.pdf
    • http://crossfitdoublebay.com/uploads/1/3/0/3/130323184/vanuvowoxaru.pdf
    • http://petroyale.com/uploads/1/3/0/2/130273578/7990960.pdf
    • http://www.swazilocs.com/uploads/1/3/0/4/130478551/97bc3739be8aed7.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_off0000d894.bin
be4aac34ea5219b1eeb81f7539a6d6e6e7a016479d311170eb7c6562dc07f5b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 8404 bytes

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