PDF malware analysis — malicious · 8496ecef79c4431a

MALICIOUS

PDF

87.2 KB Created: 2021-05-25 10:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: dcc8323b8bbdddd385138d3c8bc9b104 SHA-1: ab2e00acbd38736604c4b04f5a1d1abcf7e086bb SHA-256: 8496ecef79c4431a358ee2feeda97c2f75fae630110c7d32ec62fc19eef007a8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 https://golowaki.ru/strik?utm_term=newt+maze+runner+cardboard+cutout PDF link annotation
- https://cdn-cms.f-static.net/uploads/4392868/normal_5fd7e9fea1995.pdfIn PDF document text
- https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/e4af1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404296/normal_60204d2ad81d2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447880/normal_5fc591a813ad5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481509/normal_600398712087c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502178/normal_604c9ffbbd1b6.pdfIn PDF document text
- https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/2d91752.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369772/normal_600b773dcbb02.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418185/normal_6007a3c3ef9c7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495974/normal_600072ad52234.pdfIn PDF document text
- https://xamikike.weebly.com/uploads/1/3/1/4/131406211/poxavubasewusot.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383689/normal_606b487ce9437.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/8230e79f-f41b-4479-b3d4-6ad168e37897/what_is_transitive_and_intransitive_with_examples.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7606b36b-94ea-4e6c-b3cf-33f32aaf27ea/jufobu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c74bab96-e968-4edb-a6bb-f896dd54e34d/1998_johnson_25_hp_outboard_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d664539e-d325-4466-95d1-f3316b659658/bejobemilanawuzego.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/71e3a317-d4c7-498d-979a-20f4f7334861/how_to_check_mview_log_table.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2831873d-d663-44ab-87c0-e9fe73a53b2b/5579964575.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7beadd50-79ec-4a81-95e3-4c606ee565ae/cant_change_channels_on_rogers_remote.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/babe27cb-1e11-4e5f-8881-a836a2fce0b4/hp_compaq_8000_elite_convertible_minitower_specifications.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01d9ee04-49dc-496e-a69d-c5887eeaac56/ligefotukevatogumo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a11aa5db-192f-487e-9e2b-6f1753759067/fipaxurudaleka.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010044.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10044	5128 bytes
SHA-256: `e3eed33e57d91fe873163a0bb59d7caa114ddfbc412fb53ba567b7ca51389f38`
`font_01_sfnt_off000111b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111B4	10752 bytes
SHA-256: `aedb6ce476ad417720a3707b18e7187b364591d3c3262a8d996bb6c6e8900cc0`
`font_02_sfnt_off000136c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136C9	16480 bytes
SHA-256: `37564169e6e472f70dcc20fbeaa0cb085cb7163636e1d825e5080ee45426d5b6`

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