PDF malware analysis — malicious · 8577aed31b868b72

MALICIOUS

PDF

48.1 KB Created: 2020-04-16 18:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 8161d9d414e02a5412d93932a229dec5 SHA-1: 25dae6a001d4caade358bf9b390d1a2c70afde25 SHA-256: 8577aed31b868b724414cb54928778ad72feee4eaecdda6a48d885980bdcac1e

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to host malicious content. One prominent link, 'http://vansrv7.com/uploads/1/3/1/3/131380828/131380828.html#facebook+messenger+apk+ios', is presented with a lure related to Facebook Messenger. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is part of a phishing or redirection scheme.

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://vansrv7.com/uploads/1/3/1/3/131380828/131380828.html#facebook+messenger+apk+ios
- http://nishra-rama.com/uploads/1/3/0/6/130640218/lukiruxititovazib.pdf
- http://konaweddingsandevents.com/uploads/1/3/0/4/130436068/3959581.pdf
- http://lessaveurs.org/uploads/1/3/0/7/130740033/titipumu.pdf
- http://tpsmartwatches.com/uploads/1/3/0/5/130544672/vixod-nevabufutepop-lizev-disatipexokare.pdf
- http://tripinary.com/uploads/1/3/1/1/131164052/195c9f858edda.pdf
- http://3-week-diet-new.com/uploads/1/3/0/6/130620453/2004875.pdf
- http://foothillsbiblefellowship.com/uploads/1/3/1/4/131453522/fejoduzu.pdf
- http://askaccountancy.com/uploads/1/3/0/7/130776609/559df9657bb01e.pdf
- http://ilfitto.com/uploads/1/3/0/7/130776529/xupunusada_pawebileroxager.pdf
- http://hbmertz.com/uploads/1/3/0/5/130546645/4474260.pdf
- http://tetheredteas.com/uploads/1/3/1/3/131383945/ziwotusafodopa_forip.pdf
- http://ajhomecooking.com/uploads/1/3/0/8/130813985/8993680.pdf
- http://messenger
- https://messenger
- 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://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007216.bin` `430fd6e0fad6ba2ba60bab12f19e490894df5ea01f4259f213da0ebe0b620646`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7216	8312 bytes
`font_01_sfnt_off000091a6.bin` `2759de98b13a736c251b2d3f858161becd432e8af761b721aaff36d9ddd97db2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91A6	2388 bytes
`font_02_sfnt_off00009c4f.bin` `0bc403ad286ff2165224e03fce9d54bef4e30152e73f7012ec15cbe7f2cca1ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C4F	16880 bytes

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