PDF malware analysis — malicious · 77699b7716dfa5ad

MALICIOUS

PDF

82.8 KB Created: 2021-05-27 15:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 8b38bfba1c4e7fd69c84b44a1c34aef2 SHA-1: e92cc6e1a8a7965e68ee3eb5f6697017f58565db SHA-256: 77699b7716dfa5ad9d22eaeb88542496efda286f0292d2bdf33ea420ed9eea6b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, flagged as a link farm, and one specific URL points to a 'how to cheat' guide for Subway Surfers. This suggests a lure to direct users to potentially malicious content. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://gimoguvi.ru/strik?utm_term=how+to+cheat+on+subway+surfers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4500877/normal_6051a1a577ff9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411935/normal_603e0a7daaf01.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451228/normal_606de8bcbbcb5.pdfIn PDF document text
- https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/9899863.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4386333/normal_5ff4262230250.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372753/normal_605dd875d73ed.pdfIn PDF document text
- https://kiwuvewe.weebly.com/uploads/1/3/7/5/137509443/a15f2b3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4497638/normal_5ff632e2da09c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462059/normal_6025ae4f4546f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485702/normal_603509cd4b9d5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421336/normal_6060f1e3161b8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420766/normal_5ffc30807e0f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384655/normal_6020635dba1ed.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443595/normal_60002f045136d.pdfIn PDF document text
- https://bupudotededifo.weebly.com/uploads/1/3/5/3/135323991/772cbe67698449.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/b4a70411-a4dc-478c-a036-6a0b77399b03/tevifurixetitudetezapa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e57e1ad0-bc13-4f78-a259-07ab0b60c04a/95965561581.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/afd839ad-2c49-49ff-8198-2da233a8be90/39648037166.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e6c3bdca-98f7-4531-9341-4533857362b4/como_resolver_ecuaciones_diferenciales_de_primer_orden.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/90e3b6aa-d657-4462-a4ae-105a372fa2e6/alan_watts_quotes_on_death.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/307fb457-de60-4b28-91a7-7d6ae23a6c4b/my_fathers_dragon_movie_trailer.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f8aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8AA	5064 bytes
SHA-256: `2e65f64b2775678ec020c87976225cdcab6e937aa8659aed93b38067d8d49036`
`font_01_sfnt_off000109e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109E3	10448 bytes
SHA-256: `09633f749148823bc624e64e0feae5aae1630921b06742f99be191626756bd88`
`font_02_sfnt_off00012dbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DBE	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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