PDF malware analysis — malicious · 6617e3ceddaf1bc0

MALICIOUS

PDF

58.0 KB Created: 2020-03-13 01:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: a62db19e063df574df5b6f05d25b0b34 SHA-1: 13afcda6183bb5866ace463064ee38e8974fb28b SHA-256: 6617e3ceddaf1bc0e0bf8b28f53217a612d6e1b433e8ba3b8f0833a9ffbe3058

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded external links to other PDF files hosted across numerous domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict, and the sheer volume of external links suggests a non-legitimate purpose.

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://cpanel.jacksonvilleartistsguild.org/uploads/1/3/0/6/130603793/130603793.html#affinity+chromatography+instrumentation+slideshare
- http://emeraldstarcomics.info/uploads/1/3/0/7/130739032/mesulawopegedep.pdf
- http://coreofjuno.com/uploads/1/3/0/5/130588640/4994164.pdf
- http://snappyz.com/uploads/1/3/0/6/130604801/7889725.pdf
- http://rbkresearch.com/uploads/1/3/1/0/131071066/6736053.pdf
- http://www.thelifeiwantgroup.com/uploads/1/3/0/2/130270823/pewirisomelufoma.pdf
- http://noahsanchorarmy.com/uploads/1/3/0/2/130272648/3684792.pdf
- http://ns2.brisasdesantiago.com/uploads/1/3/0/5/130545327/7565128.pdf
- http://cams-collection.com/uploads/1/3/0/7/130776006/vorobikodovumu.pdf
- http://love-in-the-afternoon.com/uploads/1/3/0/4/130476313/jejilozixosizinon.pdf
- http://shadowbendtest4.com/uploads/1/3/0/4/130489523/suxonuveze.pdf
- http://rotorheadservicesllc.com/uploads/1/3/0/5/130539652/4434789.pdf
- http://rcenews.com/uploads/1/3/0/6/130620449/letekobupafudav.pdf
- http://losangeles-soul.com/uploads/1/3/0/8/130814308/7db869c698.pdf
- http://rumseytownhall.com/uploads/1/3/0/6/130621844/raxoxin.pdf
- http://www.homelessinbath.com/uploads/1/3/0/8/130814843/3464962.pdf
- http://joy-fully.com/uploads/1/3/0/2/130271096/zirovaw.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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/
- https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000adf4.bin` `60447dbd86009a8c7f2bf8c691e33ccc40e928fde4f4b2ae588f38efb2e94bbd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADF4	9068 bytes
`font_01_sfnt_off0000ce97.bin` `4e9ae17c41f053e7ad2cff4c16f4465db96732130fdde230725ded2fe80853ad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE97	3156 bytes

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