PDF malware analysis — malicious · 72574e1146ffdf0c

MALICIOUS

PDF

44.3 KB Created: 2020-06-06 07:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 86d02f14a8a132ec7792ecae130f05c3 SHA-1: bd669ff18d8e15d37a493c2de669540c0d2a5c7c SHA-256: 72574e1146ffdf0c7eb9327ebcbefc2544dad6c235e2b092ed02b84917c1f970

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://lilidzholi.com/uploads/1/3/1/3/131381363/131381363.html#ardaas+2+movie++okjatt
- http://fnbequipmentprogram.com/uploads/1/3/0/5/130590374/7920477.pdf
- http://qualityresus.com/uploads/1/3/0/5/130539849/letevutijodi.pdf
- http://kkperformance.net/uploads/1/3/1/1/131163638/6349184.pdf
- http://joattraining.com/uploads/1/3/0/3/130379357/d5bd6e.pdf
- http://thanksgivingdayonline.com/uploads/1/3/1/4/131411197/3746845.pdf
- http://richmondheightsviews.com/uploads/1/3/1/8/131871479/9626480.pdf
- http://jaxaluminum.com/uploads/1/3/1/3/131380354/c65df2b.pdf
- http://theultrabroker.com/uploads/1/3/1/4/131438523/8808631.pdf
- http://lilidzholi.com/uploads/1/3/1/3/131381363/terms.html
- http://lilidzholi.com/uploads/1/3/1/3/131381363/dmca.html
- http://lilidzholi.com/uploads/1/3/1/3/131381363/policy.html
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://zizixabaga.files.wordpress.com/2020/06/42354781161.pdf
- https://xininew948096142.files.wordpress.com/2020/06/tewanoto.pdf
- https://napipavuk.files.wordpress.com/2020/06/69894250593.pdf
- https://buwivimew.files.wordpress.com/2020/06/dawetozedalojizazafebupuf.pdf
- https://rifirajabug.files.wordpress.com/2020/06/59992372622.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000068bf.bin` `d1d9e7e5eb40906aa214973e52ce1845fb85dc9a8292f538768fc381c63e6a31`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68BF	12004 bytes
`font_01_sfnt_off00009093.bin` `ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9093	16164 bytes

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