PDF malware analysis — malicious · 0f47c6c9719603f3

MALICIOUS

PDF

36.7 KB Created: 2020-11-07 22:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 15df5464f533a8db4d6592661d236863 SHA-1: 15393ae13ea734aac1661dfce7c515194150d075 SHA-256: 0f47c6c9719603f31d2a786548ec29c9e0504d126f0ad3d7cbebe2a385a77234

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. One of the primary links points to 'https://trafficel.ru/aws?keyword=kenmore+ultra+wash+quiet+guard+manual', and another significant link farm points to 'https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/b8742a4.pdf'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the structure suggests an attempt to manipulate search engine results or redirect users to potentially malicious sites, aligning with a spearphishing attachment vector.

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 https://trafficel.ru/aws?keyword=kenmore+ultra+wash+quiet+guard+manual
- https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/b8742a4.pdf
- https://cdn-cms.f-static.net/uploads/4381289/normal_5f911492b6c8b.pdf
- https://cdn-cms.f-static.net/uploads/4406228/normal_5f9491c960ca7.pdf
- https://cdn-cms.f-static.net/uploads/4443372/normal_5f9ed01e0f112.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/d3a04f32-538f-487d-a927-442ae08208b2/topographic_map_profile_practice_pac.pdf
- https://s3.amazonaws.com/zaxuledo/manual_setting_on_instant_pot_ip-duo.pdf
- https://s3.amazonaws.com/nakevoja/bluejacking_ppt_and.pdf
- https://s3.amazonaws.com/geradi/84303194252.pdf
- https://s3.amazonaws.com/memul/ishares_moderate_allocation_etf.pdf
- https://s3.amazonaws.com/widofafane/john_milton_poems.pdf
- https://uploads.strikinglycdn.com/files/a7f747eb-52b4-4d95-8f54-3e888401a9f9/53028823605.pdf
- https://s3.amazonaws.com/wewuxuviwar/hermitage_springs_tn_real_estate.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004650.bin` `8fc6282e271c9d3a2928bdafa59497393c40bd75a0212124cbb75d0ca444382d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4650	5428 bytes
`font_01_sfnt_off000058a2.bin` `94371c9fd72f1cefa6337518d42d988840d33b20e2010c54a3067eca2826a346`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58A2	13860 bytes

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