PDF malware analysis — malicious · 82741003f4844c24

MALICIOUS

PDF

50.1 KB Created: 2020-05-15 00:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d5093a0de0f9a930abe7c55b996147e9 SHA-1: aa53181a7b6493103d360a39046719ef6e3605cc SHA-256: 82741003f4844c24f727e3001a9c6183004c4abd77ef65b4a4c1d1bfc3da85f8

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these URLs, suggesting a coordinated effort to redirect users to potentially malicious content or engage in SEO spam. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://animasbodywork.com/uploads/1/3/1/4/131408930/131408930.html#affirmative+to+negative+sentence+transformation
- http://commandhealing.com/uploads/1/3/1/1/131163909/7485846.pdf
- http://jayshockblast.com/uploads/1/3/1/6/131637099/ruluvum.pdf
- http://robbinscleaningservices.net/uploads/1/3/0/6/130604405/jakokonevekim-gojekagawudiv-togejola-ponebom.pdf
- http://generationmuso.in/uploads/1/3/0/4/130483498/movinofolo.pdf
- http://allenhomestaging.com/uploads/1/3/0/6/130604026/f9b5892f5217.pdf
- http://insurancebynathan.com/uploads/1/3/0/6/130621388/3308174.pdf
- http://suddenlysouthinteriors.com/uploads/1/3/1/3/131384432/87090ff5d584.pdf
- http://gatecitywholesale.com/uploads/1/3/1/4/131407892/sanikikipiliverajas.pdf
- http://primecutmowinggarden.info/uploads/1/3/0/2/130289553/gelixi.pdf
- http://inkgenio.it/uploads/1/3/0/6/130620468/cb013c951c78d.pdf
- http://serviertransformationdigital.com/uploads/1/3/1/8/131856121/sezaxexazaper_bosuwoluf_jofosope.pdf
- http://gnoraos.com/uploads/1/3/0/3/130312916/vezodat.pdf
- http://coloradoqualityflooring.com/uploads/1/3/0/5/130540461/4464382.pdf
- http://barriocuarto.com/uploads/1/3/1/6/131637362/663649.pdf
- http://madelineliao.com/uploads/1/3/0/5/130543656/8400438.pdf
- http://gritinvestments.org/uploads/1/3/1/3/131384306/9038234.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000712a.bin` `3232bdcd35b779520b5d2a694ab81bcd4274208fd4d3ec9b1039a68f815712a4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x712A	12016 bytes
`font_01_sfnt_off000095a0.bin` `7a4c26359170f3c28f5bc0ab14866f3f7c3dc40e5acde0860922074949b00485`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95A0	11272 bytes

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