PDF malware analysis — malicious · ba08252957f4a084

MALICIOUS

PDF

63.6 KB Created: 2020-03-25 07:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 267c0b28de30f9e7c2fadae32f8898be SHA-1: ecb3307d175b1d0c7354faba126aede4c42ce8d0 SHA-256: ba08252957f4a084b2103069f2dff119c732e63edd68690acf1031a8fa2a9dc8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam operation. The ML classifier strongly flagged this PDF as malicious. The document body contains references to 'Rolling stones let it bleed album songs' and 'wkhtmltopdf', which appear to be lures to attract users to the numerous embedded URLs. 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://hitsterrecords.net/uploads/1/3/0/4/130476791/130476791.html#rolling+stones+let+it+bleed+album+songs
- http://www.marillou.dk/uploads/1/3/0/6/130620677/lufalis-giboteta.pdf
- http://lipscombacademypto.org/uploads/1/3/0/6/130603928/faxagajukoseganasap.pdf
- http://scavengersolvers.com/uploads/1/3/0/8/130874645/7536290.pdf
- http://us-sog.net/uploads/1/3/0/8/130874019/8444718.pdf
- http://httpsbelovedatthecafe.com/uploads/1/3/0/5/130589098/kipawotipatamisuge.pdf
- http://hostmaster.excelsiorcothen.nl/uploads/1/3/0/6/130639896/sutux.pdf
- http://swsformworkltd.com/uploads/1/3/0/8/130874067/8880942.pdf
- http://southernsem.com/uploads/1/3/0/5/130551154/ba862936d.pdf
- http://derjusa.com/uploads/1/3/0/4/130489081/fasofadokevimuk.pdf
- http://portsmouthweddingphotographers.com/uploads/1/3/0/3/130323968/nirazol-tewixuxi-kasume-kedategedeluxu.pdf
- http://jennifersherart.com/uploads/1/3/0/5/130550655/b81bd8af5612152.pdf
- http://theboilerboss.com/uploads/1/3/0/5/130589283/pirofixajukoziz.pdf
- http://acase-au.com/uploads/1/3/0/2/130289478/vopeperesinoxi_sakokagekax_netubawobu_fonewaxumag.pdf
- http://newsightproductions.com/uploads/1/3/0/4/130476143/nirisaj-woxib-xipad.pdf
- http://erotihub.com/uploads/1/3/0/2/130291544/79cc991b3e52.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c526.bin` `485a1fb87de9ef8d38421254714f5b18c90c5560b416ef94354be6eff6251e77`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC526	8724 bytes
`font_01_sfnt_off0000e6d8.bin` `1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6D8	2652 bytes

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