PDF malware analysis — malicious · 9c43f1a274b09394

MALICIOUS

PDF

70.0 KB Created: 2021-01-07 20:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: 3937340d5d59302e0ff6d3c1b20afdbb SHA-1: ec10bd91d1cb66747b0d03b08e391276bcb0e12a SHA-256: 9c43f1a274b09394918b93c93313b36187ac6413953b1d297e74f9e0b9503db8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or SEO manipulation attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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://trafftec.ru/aws?utm_term=narrative+report+global+handwashing+day PDF link annotation
- https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
- https://nurobajaxi.weebly.com/uploads/1/3/4/5/134507542/ravosamuzop.pdfIn PDF document text
- https://putepinezuvoko.weebly.com/uploads/1/3/1/8/131856998/c94d0db7c.pdfIn PDF document text
- https://cdn.sqhk.co/jasowipe/VPSifhh/syrian_hamster_rescue_near_me.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/kubafezin/78816154331.pdfIn PDF document text
- https://s3.amazonaws.com/zuwimadaneb/benivuzifazapimoliziname.pdfIn PDF document text
- https://s3.amazonaws.com/xirixepo/74355131743.pdfIn PDF document text
- https://s3.amazonaws.com/mexesazaxasa/ramiremepemi.pdfIn PDF document text
- https://s3.amazonaws.com/nafibanefexex/nodozisovewawurewabefaz.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d172.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD172	5584 bytes
SHA-256: `0d3c33a3bf791d5f5104f96ca96e4c7432aa054004ffc4e43fd84876041bc5de`
`font_01_sfnt_off0000e47e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE47E	11524 bytes
SHA-256: `df2b87c08b1bddc8c69c9b0d2d185fd555d05fd9ecb987ae161291e0ca29f370`

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