PDF malware analysis — malicious · 71312204fd3d6514

MALICIOUS

PDF

70.0 KB Created: 2020-11-24 20:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: ea1c2f248ac21022ddc5474ac5988ff7 SHA-1: 812bbaf9de1cd1fbf09ebf27e843ae656b98777b SHA-256: 71312204fd3d6514d30f4682039b618a3f40f10f65b095ecf804d371beacd25d

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF containing a large number of embedded links, many of which point to disposable hosting or known redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, but the PDF structure itself is designed to lure users to external, potentially harmful, sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://gettraff.ru/123?utm_term=smoky+hill+library+%2528arapahoe+libraries%2529 In PDF document text
- https://pugujexavifik.weebly.com/uploads/1/3/4/7/134702512/zibubasovilim_dulamoziti.pdfIn PDF document text
- https://romagazep.weebly.com/uploads/1/3/4/7/134759296/9501217.pdfIn PDF document text
- https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/muzililakusamipegefe.pdfIn PDF document text
- https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.pdfIn PDF document text
- https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/7212633.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
- https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/2516242.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/1f5acb76-e82c-426d-9a55-91e46c4dfb7f/99952642959.pdfIn PDF document text
- https://s3.amazonaws.com/xamapebonijos/release_of_lien_form_texas_construction.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97ac566d-cdc9-4d7b-b772-5801b64608e8/torobepepaxaniroji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec268abe-c53a-4aef-9dc3-ee36df15536f/84911974291.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/70ec2f49-74b5-42c5-b2bf-976ed32a7e37/35208133198.pdfIn PDF document text
- https://s3.amazonaws.com/mokavilez/california_notary_test_study_guide.pdfIn PDF document text
- https://s3.amazonaws.com/belapawerezuju/horus_and_set.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4cd75fbf-0e53-4b6b-af63-84a26e2452a7/51115649704.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_off0000c7f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7F0	5224 bytes
SHA-256: `9efa75973d9bdaf44ab81a268f141cd67423ab491bb668bcc6d517e72f928d8e`
`font_01_sfnt_off0000d9b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9B2	10388 bytes
SHA-256: `47940b6a59156490f54ec67cc197c56e3e786447cc6e3dcdd55e929a940ff59b`
`font_02_sfnt_off0000fd2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD2E	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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