PDF malware analysis — malicious · 16c6196268c1903f

MALICIOUS

PDF

93.6 KB Created: 2021-05-29 09:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 01a969dd20de8df0cf12d362a9ffe817 SHA-1: 4c0790de502b4fa0d342bbe2c0fbbaaee46d66d7 SHA-256: 16c6196268c1903f1716c3c29986bc4a9a96d147463ea8b8cb31bc7d46886460

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as a link farm, with a high ML score and ClamAV detection indicating malicious intent. It contains numerous external links, including one to 'druttle.ru' and several hosted on Weebly, suggesting it's designed to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself is indicative of a phishing or SEO spam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 6

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://druttle.ru/wb?keyword=what%20happens%20if%20you%20both%20have%20a%20straight%20in%20poker PDF link annotation
- https://ronesafoko.weebly.com/uploads/1/3/4/3/134312324/291e8fdf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422368/normal_602476ea515e5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487906/normal_60226239e90fe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4455881/normal_600151b388594.pdfIn PDF document text
- https://xupotigoxurope.weebly.com/uploads/1/3/4/6/134657266/xikaribali.pdfIn PDF document text
- https://vurinilobato.weebly.com/uploads/1/3/1/4/131454355/534768.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416322/normal_5fde147f077ba.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447270/normal_606de8106b8a7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365624/normal_60069fb671b8b.pdfIn PDF document text
- https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/vodafena-dumofosinana-wopusasawi-zufas.pdfIn PDF document text
- https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/5667156.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416490/normal_601912c22fb4a.pdfIn PDF document text
- https://rakurewirusemew.weebly.com/uploads/1/3/4/0/134017151/603796.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449419/normal_600a4fb54c238.pdfIn PDF document text
- https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/e3c946d5916a8.pdfIn PDF document text
- https://suxasamivozafe.weebly.com/uploads/1/3/4/7/134705269/410443.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/a4c26249-659e-48a5-900f-98e61f7ac408/maze_runner_1_ending_explained.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f577c83e-0aa4-4821-a4b0-735185f583f9/machine_learning_python_tutorial_github.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bdb4ea67-70a1-4fdf-b900-9e33ede81631/pilemadukixuperemor.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fad16717-7d5a-4767-ac6d-f648f46bfb17/51796529558.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/75a69402-7bb1-4e06-b93e-6339577f2944/ribodugaberom.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9379ce34-506d-4f08-8060-43a353261df8/jepepokadusugusurokape.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f0a2ec85-d5fc-43fc-a463-66b09aa35bf0/gogesobi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d811c6d4-9b18-4127-a0a5-7396de92bf87/how_to_make_a_budget_for_nonprofit_organization.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_off0001232d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1232D	5392 bytes
SHA-256: `2f651c306579990e40eba620a741ec318d7de1f5e09cef493b6fe549cb9a55ff`
`font_01_sfnt_off00013591.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13591	10920 bytes
SHA-256: `c79351294fd3cfbaf450586a713c658f2b2ba79095c8370b89329f9e0efa0dcf`
`font_02_sfnt_off00015a3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15A3B	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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