PDF malware analysis — malicious · 3e8359ee19abc41a

MALICIOUS

PDF

41.3 KB Created: 2020-04-19 10:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 2472f0255019b123e381e989fbf9f116 SHA-1: 504bd84cb108feed33f1e1908ce770abadd077a3 SHA-256: 3e8359ee19abc41ad9071b248aa7cb630dbb2775624ea2629adf18cd22a828ad

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm, likely used to manipulate search engine rankings or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. The presence of numerous SEO-optimized PDF links suggests an attempt to lure users through search engines.

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://impact-active.com/uploads/1/3/0/5/130545382/130545382.html#coreldraw+latest+version+free++filehippo
- http://apapparellondonltd.net/uploads/1/3/1/4/131454549/wixiforaxaromupe.pdf
- http://cassiecares.org/uploads/1/3/0/6/130621772/fisotinegis.pdf
- http://pridegraphix.com/uploads/1/3/0/5/130551342/nosipukid-jefiwumamim-podepado.pdf
- http://huurschuur.nl/uploads/1/3/0/9/130969198/3298009.pdf
- http://carrollhudders.com/uploads/1/3/1/6/131606259/7619f9d85ab9a4.pdf
- http://foothillstrails.com/uploads/1/3/1/4/131453406/sirirovibejowiwam.pdf
- http://fireplaceministries.org/uploads/1/3/0/8/130813834/xeraf.pdf
- http://zingkinesiology.com/uploads/1/3/1/3/131379636/wodofepevuvu.pdf
- http://golfdeslacs.be/uploads/1/3/0/6/130640063/552662.pdf
- http://lafinegueuleparis.net/uploads/1/3/1/4/131438234/2929965.pdf
- http://aleksandramysiak.pl/uploads/1/3/0/7/130775016/zikuxa.pdf
- http://kollaborateglobal.com/uploads/1/3/0/6/130620662/reforigapiduv.pdf
- http://mylifesuccessformula.com/uploads/1/3/1/1/131164128/toxipotozebokar.pdf
- http://djshanetaylor.com/uploads/1/3/0/6/130604613/ab207.pdf
- http://ashleyblanck.com/uploads/1/3/1/4/131452778/3333270.pdf
- http://apapparellondonltd.net/uploads/1/3/1/4/13145
- 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006d90.bin` `08727ec398e38e2338d1419bc8faf2118da85b4e7eb799c3943850752d279c32`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D90	8592 bytes
`font_01_sfnt_off00008e65.bin` `e85238f5b2d23b53afc21fb4b7984e7dce0ca2bb4a70220c5cef224cec90116a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E65	2804 bytes

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