PDF malware analysis — malicious · 6265c77516046b45

MALICIOUS

PDF

37.7 KB Created: 2020-06-03 21:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 65519337fb8f759cfa768f24d4701c37 SHA-1: 14d28a2b4733798ab5ec20b038649d5fa24cf5a9 SHA-256: 6265c77516046b4550d9ed399f80367d2b1c9bb7f3d169f2cf223dcb434596e6

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded 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 ML classifier also strongly indicated maliciousness.

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://a1793539xstreamtravel.xsideas.com/uploads/1/3/1/3/131398148/131398148.html#mesopotamian+economy+and+trade
- http://velocityerp.us/uploads/1/3/1/4/131452884/0f9a98a06acd13.pdf
- http://serenityrecovery-wky.org/uploads/1/3/0/8/130813945/jekapumapagakaxogen.pdf
- http://legendsofthestage.net/uploads/1/3/0/5/130589241/waribolaxorekazew.pdf
- http://endeavorjewelry.com/uploads/1/3/0/7/130740148/047085530.pdf
- http://mta-sts.boxofficesa.co.za/uploads/1/3/0/2/130289189/6772028.pdf
- http://mackaymaintenances.com/uploads/1/3/0/7/130775688/ec0074f20ec8.pdf
- http://lekarchitect.com/uploads/1/3/0/6/130639729/3218438.pdf
- http://melbournetreespecialist.com/uploads/1/3/0/2/130288798/3321928.pdf
- http://affordablecommunitymovers.com/uploads/1/3/0/6/130621455/8785415.pdf
- http://wellingtonhomebirth.org/uploads/1/3/0/7/130776298/443592.pdf
- http://a1793539xstreamtravel.xsideas.com/uploads/1/3/1/3/131398148/terms.html
- http://a1793539xstreamtravel.xsideas.com/uploads/1/3/1/3/131398148/dmca.html
- http://a1793539xstreamtravel.xsideas.com/uploads/1/3/1/3/131398148/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://robesezidir.files.wordpress.com/2020/06/95273905119.pdf
- https://nogilofonula.files.wordpress.com/2020/06/regajuxipajuxa.pdf
- https://muvuwasowa207222626.files.wordpress.com/2020/06/bemerovepimefofire.pdf
- https://baxebebuv.files.wordpress.com/2020/06/fokelixugenegojenopuv.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/
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000067fd.bin` `8e0f67a89532608f3cafa4ff548f4163d158a00563de80b89e93296af87c6b10`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67FD	10264 bytes

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