PDF malware analysis — malicious · 4b1e595899212fad

MALICIOUS

PDF

34.9 KB Created: 2020-03-11 07:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 1fb84fe58d8dbcd0432302bce058a98f SHA-1: f6e8d2cbebf34a7bf94eb45eb0baf4cf6090e800 SHA-256: 4b1e595899212fad7e8e8c53596712f7eb264c7d7aadae74d097796941bc9a97

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which follow a similar pattern of pointing to PDF files on various domains. This suggests a link farm or a method to distribute malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs supports this assessment. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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://mta-sts.mx.grandsalinelibrary.com/uploads/1/3/0/6/130640172/130640172.html#trane+cvhe+500+manual
- http://www.britishinspirationsllc.com/uploads/1/3/0/5/130539738/vosofib_vebena_bipexutiboxorum_baniwe.pdf
- http://peterinova.com/uploads/1/3/0/6/130621985/57668f1144.pdf
- http://nakomahomesandland.com/uploads/1/3/0/6/130639175/3638805.pdf
- http://eveningshadows.org/uploads/1/3/0/4/130478163/52657e7.pdf
- http://toprecruit.us/uploads/1/3/0/2/130272369/29eb90d3637.pdf
- http://www.rosaettore.com/uploads/1/3/0/7/130776425/a9cf70b361199.pdf
- http://cpanel.melsellsparadise.com/uploads/1/3/0/2/130288421/zixalixum-fubesikabisaf.pdf
- http://xgolfabilene.com/uploads/1/3/0/5/130544390/ccb9e372f88c01a.pdf
- http://www.permaculturegeorgia.com/uploads/1/3/0/7/130776208/negunoloni.pdf
- http://nighttour.com/uploads/1/3/0/7/130740524/752850.pdf
- http://prettyunik.com/uploads/1/3/0/6/130604074/5309877.pdf
- http://thestickermill.com/uploads/1/3/0/2/130270779/jesadoduvojiniki.pdf
- http://pocusworld.com/uploads/1/3/0/5/130550936/36e9f4fe5820aea.pdf
- http://www.northernillinoisfootandankle.com/uploads/1/3/0/5/130550956/c819ea8d050f04.pdf
- http://thebourbondictionary.com/uploads/1/3/1/0/131070371/af65cfdd7c2300.pdf
- http://thetoothfare.com/uploads/1/3/0/9/130969360/6122928.pdf
- http://mail.project127.com/uploads/1/3/0/6/130604621/4a74c.pdf
- http://autismstorificview.com/uploads/1/3/0/5/130588618/a65f56f.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_off00006196.bin` `e6c3f31d13a16a239be2601217a02019ba6dfb60e6dc0d7456fadf0d824082bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6196	7464 bytes

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