PDF malware analysis — malicious · 365e6c4ed29b1360

MALICIOUS

PDF

51.2 KB Created: 2020-03-27 10:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: e959638478912fcdb81c9e930ff7260a SHA-1: a8cac5719ca262cca3abd8569095860463f9618a SHA-256: 365e6c4ed29b1360ffa37ff54f6420f6d9c876fa443a33b6f745531f6eaad1a0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. This suggests a link farm or content distribution scheme, likely intended to manipulate search engine results or distribute further malicious payloads. The primary attack pattern involves luring users to these external resources.

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://prontopersonaltraining.com/uploads/1/3/0/7/130739582/130739582.html#como+deben+ser+las+pendientes+de+dos+rectas+paralelas
- http://hostmaster.natur-ally.org/uploads/1/3/0/8/130874076/gaguzovobes.pdf
- http://bedbeacon.net/uploads/1/3/0/7/130776182/fogibe.pdf
- http://luiscunha.net/uploads/1/3/0/5/130547515/walopi.pdf
- http://aperitif-sticks.at/uploads/1/3/0/5/130543656/4095699.pdf
- http://stewarthawkins.com/uploads/1/3/0/5/130588560/samol.pdf
- http://socialimpactcommunications.com/uploads/1/3/1/0/131070911/3995598.pdf
- http://emobilityadvisors.net/uploads/1/3/0/7/130740378/nasiviw_totedosanus.pdf
- http://justbuddha.com/uploads/1/3/0/7/130775052/tutiwunixasivub.pdf
- http://proteanyc.com/uploads/1/3/0/4/130476579/dorofu-wuvuziwepij.pdf
- http://www.eagletracking.com.co/uploads/1/3/0/4/130478004/padipuxozoleb.pdf
- http://umfsr.org/uploads/1/3/0/5/130540186/ganow_pafeto_sodet.pdf
- http://harmonyathomedesigns.com/uploads/1/3/0/5/130545681/444241ab9532.pdf
- http://www.phstitansrugby.com/uploads/1/3/0/4/130489226/gowipamoxukadane.pdf
- http://checksymptom.com/uploads/1/3/0/7/130740493/6260963.pdf
- http://laurielyons.net/uploads/1/3/0/6/130603834/biwofot.pdf
- http://carlos-morales.com/uploads/1/3/0/2/130288361/riwurabekisiwow.pdf
- http://wakelives.com/uploads/1/3/0/4/130490643/2e592e31c5.pdf
- http://motovillaitalia.net/uploads/1/3/0/3/130324248/nusagutewibepapibevi.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_off00009a69.bin` `cc65cc9c199c793c9bd41647fe7f08169e9aa6fec58ff4073a341c1e12232e8c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A69	9540 bytes

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