PDF malware analysis — malicious · ceef1ced29e08b80

MALICIOUS

PDF

39.8 KB Created: 2020-03-31 04:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 33d9a2f774743c38a35ec9cb9ca2daab SHA-1: bab9e45d62b1190d244612f326392999fb71cea0 SHA-256: ceef1ced29e08b806f479f1239def9bb8cc6c003a99ea27052303310b3736296

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a mechanism to distribute content across many sites, potentially for SEO manipulation or to host malicious payloads. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded link farm.

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://5pointauto.com/uploads/1/3/0/2/130291874/130291874.html#intereses+pagados+por+anticipado+en+contabilidad+definicion
- http://awningsgoldcoast.com/uploads/1/3/0/7/130775594/9776212.pdf
- http://millsupportzuid.com/uploads/1/3/0/4/130488940/begelokowiwiratud.pdf
- http://chelseafitnessnyc.com/uploads/1/3/1/4/131406681/6589762.pdf
- http://cfquinnhall.com/uploads/1/3/0/5/130588256/b782ba9.pdf
- http://sophiesstores.com/uploads/1/3/0/9/130969235/napijaxoso.pdf
- http://isotomicstudios.com/uploads/1/3/0/7/130776416/27ca48e9ff0ac.pdf
- http://anger-management-coach.com/uploads/1/3/0/6/130604415/4cd4ad902.pdf
- http://floridacollegiatespearfishing.com/uploads/1/3/0/3/130323477/355467.pdf
- http://holisticbirtheducation.com/uploads/1/3/0/8/130814516/duvafabuje.pdf
- http://elleywu.com/uploads/1/3/0/8/130813953/10df5bfae.pdf
- http://donsuponenterprise.com/uploads/1/3/0/6/130639776/fugomaro-zafaxus.pdf
- http://sbrenovationsltd.com/uploads/1/3/1/1/131163669/a1285e5061b2dc.pdf
- http://force-w.com/uploads/1/3/0/6/130639107/pufisenup.pdf
- http://janethaworthnaturopath.com/uploads/1/3/0/2/130273850/8ae03fb542.pdf
- http://medinaschoolha.org/uploads/1/3/0/5/130551177/sivowo.pdf
- http://miuibox.org/uploads/1/3/1/0/131069997/8643291.pdf
- http://bigrockface.com/uploads/1/3/0/7/130775506/19a8ea3.pdf
- http://svcportland.com/uploads/1/3/0/4/130475997/jekekew_zebutegoforujif_jirede.pdf
- http://andreanewgiza.com/uploads/1/3/0/7/130776183/0f9035f4ce4.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007270.bin` `c310217b1421b27ecf3800048b6942cb3718fd5a6f3c73c034266207582447c1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7270	8440 bytes

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