PDF malware analysis — malicious · 63afca6a7828d260

MALICIOUS

PDF

34.3 KB Created: 2020-05-15 15:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4c8e397a099f9120400aa398ee9f3a6d SHA-1: a10396dc3cd0245a748403ff0c1d73bfd4cafd1e SHA-256: 63afca6a7828d260b9be50275f705aa4330e67a49d0cba7bb474a6cb857a7a3a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body contains text related to a worksheet, but the primary malicious activity appears to be the mass redirection to external URLs, likely for SEO spam or to host further malicious content.

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://komercallc.com/uploads/1/3/0/7/130776592/130776592.html#prepositional+phrase+worksheet+ks2
- http://jayvapejuice.com/uploads/1/3/0/2/130288802/tivifesawofiw.pdf
- http://uncorkedrunner.com/uploads/1/3/0/5/130551190/fugev.pdf
- http://aero-scale.com/uploads/1/3/0/3/130324420/0dc98710991a96.pdf
- http://prestomagictricks.com/uploads/1/3/0/4/130478975/kozetagudimew_vutizopejugumu.pdf
- http://edgewoodconferencecenter.com/uploads/1/3/0/6/130620838/totoruzo.pdf
- http://jdotech.net/uploads/1/3/0/6/130604973/xabavukunijifar.pdf
- http://thewreckingroom.net/uploads/1/3/0/5/130547038/7172186.pdf
- http://alltvnetwork.org/uploads/1/3/1/4/131406288/bozorudademaga.pdf
- http://mukboko.com/uploads/1/3/0/3/130313044/bonanamuv.pdf
- http://stevengethard.com/uploads/1/3/0/6/130620613/6566663.pdf
- http://aletaslater.com/uploads/1/3/0/5/130588718/5993d68e3.pdf
- http://appetitt.org/uploads/1/3/1/3/131380531/7fefec5.pdf
- http://katnsag.us/uploads/1/3/1/3/131383588/eb3ca.pdf
- http://inspectpa.net/uploads/1/3/0/8/130874668/d187cb49e2d5548.pdf
- http://elitedesignshoppe.com/uploads/1/3/0/5/130588206/nivejux.pdf
- http://jfleischer.com/uploads/1/3/0/2/130274355/sowuzeju.pdf
- http://h2oweddings.com/uploads/1/3/0/7/130739220/gitekoviwojum.pdf
- http://easytrack.nz/uploads/1/3/1/6/131637034/binukakunivavukoxak.pdf
- http://prepandprimehairstudio.com/uploads/1/3/0/2/130270934/kirabomomoxeziv.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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_off00005be7.bin` `56e208872beab327fa887f72c2b2dbfdfb60d2dbcba1fcb73341bd1d228940d2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BE7	9772 bytes

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