PDF malware analysis — malicious · 7191aa420c45a1cd

MALICIOUS

PDF

37.4 KB Created: 2020-06-15 16:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1e3bd101a7b4a553ee32011dcf6b6989 SHA-1: 6ebee484ba87fced5b109dfa32486614f64a40cc SHA-256: 7191aa420c45a1cd8be2df734d10ac9ddb141eda2158c74550c1613c2eeaad7c

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which point to suspicious domains and appear to be part of a link farm designed to host malicious content. The presence of a 'smart pdf download' lure and a visual download button suggests a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a malicious campaign.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://windows-defender.com/uploads/1/3/1/4/131453454/131453454.html#smart+pdf+download
- http://villanuevaemplata.com/uploads/1/3/0/6/130621775/tukuwozawi.pdf
- http://hostmaster.touristinrome.com/uploads/1/3/1/4/131408168/waromakefujag.pdf
- http://great-wall.online/uploads/1/3/0/7/130740146/nukabexovamurafopej.pdf
- http://cindispillman.com/uploads/1/3/0/7/130738753/karezowiwo.pdf
- http://bodyprojecttreatment.com/uploads/1/3/0/6/130640125/tajabugiw_zegidorukukekon.pdf
- http://evolutionsuperfoods.com/uploads/1/3/0/5/130588518/6257427.pdf
- http://hostmaster.kidwellybowls.com/uploads/1/3/0/6/130604312/9234830.pdf
- http://webdisk.myo2billing.co.uk/uploads/1/3/0/5/130551864/pivosakajekir_ramavo.pdf
- http://nolimitz.net/uploads/1/3/1/6/131606241/mupovufokovize.pdf
- http://easymacsupport.com/uploads/1/2/9/0/129099120/129099120.html?solidworks
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://bibefiv.files.wordpress.com/2020/06/tutukavinulelaxojamorodul.pdf
- https://lavasotesug.files.wordpress.com/2020/06/45966297848.pdf
- https://sixupijemiw.files.wordpress.com/2020/06/lagamepatipotujefimotube.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/
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006561.bin` `b847ba58153b9c711bc74005ce948e156cb62166155b6c01f5803f17112b3ae3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6561	10804 bytes

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