PDF malware analysis — malicious · d57f5f7f66589d0e

MALICIOUS

PDF

37.4 KB Created: 2020-06-05 01:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 355ac6c4089137a392473402135d851c SHA-1: 66f103204a05bf7d1579ea723653d7b7c7783aa6 SHA-256: d57f5f7f66589d0eec84a468b937fc6f71b94179d1b60c2b30a6d94fb17baa7c

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs suggest a link farm or SEO manipulation tactic, potentially used to distribute further malicious content or to engage in phishing. No scripts were extracted from this sample.

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://1s8ne0.salon225.com/uploads/1/3/1/3/131379247/131379247.html#math+2220+cornell
- http://bevpecksmiles.info/uploads/1/3/1/3/131383575/baluvunusej.pdf
- http://cpanel.chrisfoxrealtor.com/uploads/1/3/0/5/130543188/4c29be53e4c.pdf
- http://wiebercontracting.com/uploads/1/3/1/4/131406108/juzafubux.pdf
- http://grayfurnacemanmakesbeermakesbeercom.com/uploads/1/3/1/3/131383753/jareda.pdf
- http://moffettlawllc.com/uploads/1/3/0/6/130605302/meditetubut_wiletekijeri_gozepu.pdf
- http://metrostratareports.com.au/uploads/1/3/1/4/131437656/2127125.pdf
- http://wilbrant.com/uploads/1/3/0/7/130776649/wisuka.pdf
- http://autodiscover.pawsawaytravel.com/uploads/1/3/0/2/130289496/purakikin_xowesoziri_tezif_gejorixafujujov.pdf
- http://1s8ne0.salon225.com/uploads/1/3/1/3/131379247/terms.html
- http://1s8ne0.salon225.com/uploads/1/3/1/3/131379247/dmca.html
- http://1s8ne0.salon225.com/uploads/1/3/1/3/131379247/policy.html
- https://xenexusese.files.wordpress.com/2020/06/65795266474.pdf
- https://bekametal.files.wordpress.com/2020/06/83997281490.pdf
- https://divejenezu.files.wordpress.com/2020/06/lawowuzedojape.pdf
- https://pudagurujawa410648844.files.wordpress.com/2020/06/lixulov.pdf
- https://bojesegok.files.wordpress.com/2020/06/milaliwenibaderogebek.pdf
- https://pajiwilojex.files.wordpress.com/2020/06/tojerutabojakopa.pdf
- https://milinubed.files.wordpress.com/2020/06/93541892014.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_off000066cd.bin` `18fc8c2fbfa21dfd854404ace7d6c068e86cc2453f27fa05e622bfc6252065ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66CD	10200 bytes

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