PDF malware analysis — malicious · db8ca59975a53881

MALICIOUS

PDF

94.5 KB Created: 2021-03-14 23:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04

MD5: 01f113378d09ba84b474182c293a7ad2 SHA-1: 059793bab7be40fb7c929c9f4b79164ec7fd7e01 SHA-256: db8ca59975a53881a5031df2310c52f5fc46e88f3899698312ec8653aeb2e4bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are designed to appear as search results for software patches, a common phishing lure. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and one of these links, https://jottigo.ru/wix?keyword=skyrim+immersive+creatures+special+edition+patch, is directly embedded. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://jottigo.ru/wix?keyword=skyrim+immersive+creatures+special+edition+patch PDF link annotation
- https://static.s123-cdn-static.com/uploads/4406228/normal_6007b36b1b92f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418399/normal_601b7f18d4698.pdfIn PDF document text
- https://cdn.sqhk.co/nokotadi/8q9hiNb/xexadivuwemometerus.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378164/normal_6028948231093.pdfIn PDF document text
- https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/d61d27d312110f.pdfIn PDF document text
- https://volikupiwete.weebly.com/uploads/1/3/4/6/134676366/9535316.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451766/normal_604b5ceb1aedb.pdfIn PDF document text
- https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/6e83afc.pdfIn PDF document text
- https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/160f07df3416e3.pdfIn PDF document text
- https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/535d6.pdfIn PDF document text
- https://cdn.sqhk.co/tavaxiwugo/Xjcwejj/room_light_colour_change.pdfIn PDF document text
- https://cdn.sqhk.co/figegixo/ggjbggS/zombie_diary_2_mod_apk_cheat.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_f40c33c3013b49c09251e94b19f5d185.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/somamere/20689415111.pdfIn PDF document text
- https://s3.amazonaws.com/gonima/chicago_electric_welding_helmet_not_working.pdfIn PDF document text
- https://s3.amazonaws.com/vedexajawo/bureau_informatique_chez_ikea.pdfIn PDF document text
- https://s3.amazonaws.com/sumesawoxajew/1797312620.pdfIn PDF document text
- https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_723abc96469f479ea36c62fad06a70c4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fosawef/8189672730.pdfIn PDF document text
- https://s3.amazonaws.com/mufukep/casio_illuminator_watch_manual_3224.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_off000128c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128C3	3296 bytes
SHA-256: `b69e754470ff3df76e9594fd95d514bb8db807fb685c022464b1b546a5b2a627`
`font_01_sfnt_off00013490.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13490	5644 bytes
SHA-256: `5e3edbfa9d83946e5e425bb87605f59c28f33a2f2d5a38972349d9988dd3c8e0`
`font_02_sfnt_off000147a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x147A7	10608 bytes
SHA-256: `f6919b6afb091f44f42c784febb661f4002f2892b7af9770e8f0f7b8c2f425a5`

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