PDF malware analysis — malicious · 71a92127883ce10c

MALICIOUS

PDF

38.8 KB Created: 2020-03-20 07:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: d2a97e736c37e1700b35e8326f05dc18 SHA-1: 0530dc4401d4e354112fcd3a4363a6b8c0385fa5 SHA-256: 71a92127883ce10c539698038f18954f3d37f4f8bcbfffd0b0cd6d8fa6735626

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content or SEO spam. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

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://cyclebavaria.com/uploads/1/3/0/3/130379295/130379295.html#lecturas+cortas+para+segundo+grado+con+preguntas
- http://beebrighthives.com/uploads/1/3/0/3/130324288/3656991.pdf
- http://riversideweddings.net/uploads/1/3/0/9/130969896/lizuvi.pdf
- http://admin.wearelkyoga.com/uploads/1/3/0/5/130543979/dotorituxataboro.pdf
- http://morrisoncohentherapy.com/uploads/1/3/0/6/130604061/5282439.pdf
- http://ag-coin.com/uploads/1/3/0/7/130776096/bidibuwiten_kopitikojetije.pdf
- http://shrewsburycondo.com/uploads/1/3/0/4/130488983/2452710.pdf
- http://theflammergroup.com/uploads/1/3/0/6/130620609/2488c7b6082c.pdf
- http://www.battlehousekeeping.co.uk/uploads/1/3/0/6/130604984/d9b3ba2176fff7.pdf
- http://mail.marymacpodcast.com/uploads/1/3/0/7/130739525/9968802.pdf
- http://ears4elderly.com/uploads/1/3/0/2/130287938/javulakodinu_tagux_tebenig.pdf
- http://coffeeatyouroffice.com/uploads/1/3/0/5/130545327/6b14037c008.pdf
- http://www.betterhomessupply.com/uploads/1/3/0/8/130813381/piwujubiwepag.pdf
- http://www.actorsworkshopperth.com/uploads/1/3/0/3/130379367/1717385.pdf
- http://cannabis-bee.com/uploads/1/3/0/7/130739201/8160592.pdf
- http://www.songarts.com/uploads/1/3/0/6/130604987/fifaxixalolep_vikew_walagowuguk_daxewedil.pdf
- http://shawndgay.com/uploads/1/3/0/4/130483338/ea01a13dccc290.pdf
- http://securitybarriergroup.com/uploads/1/3/0/5/130539115/kawulixoveva.pdf
- http://missmegon.com/uploads/1/3/0/6/130603995/ledekose-sobalapukugavo-xelavaxunib-tejelabedoti.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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006ccf.bin` `2c2ffc651014dc223dfe0a5879fcd590826a49856556feeb75de6c037e6be342`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CCF	8524 bytes

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