PDF malware analysis — malicious · f96abf1a7dd9fdc3

MALICIOUS

PDF

76.0 KB Created: 2021-01-16 14:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 51b4880e8f403e284cb1508c6bfd37f0 SHA-1: beec27627568c5886fcf7705398709e6b326a394 SHA-256: f96abf1a7dd9fdc3ef807e8245557d5a92b509aafe36c22d2df3f849bf0b8204

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, characteristic of a link farm designed to drive traffic to other sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded links suggest an attempt to redirect users to potentially malicious content or further phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://trafffe.ru/wb?keyword=bus%20driving%20simulator%20games%20free%20download%20for%20pc
- https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/0a22ffbd645a5.pdf
- https://site-1180710.mozfiles.com/files/1180710/sujabanobutidabokokuri.pdf
- https://cdn-cms.f-static.net/uploads/4427499/normal_5f999266ec79a.pdf
- https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/c95960e9970.pdf
- https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/a20aeffa1639.pdf
- https://cdn-cms.f-static.net/uploads/4388620/normal_5fa0aa0874300.pdf
- https://cdn-cms.f-static.net/uploads/4454425/normal_5fae285aad556.pdf
- https://cdn-cms.f-static.net/uploads/4366033/normal_5f8736fe728bd.pdf
- https://site-1168102.mozfiles.com/files/1168102/78026894162.pdf
- https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/e099649bd980425.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/regufojalojaza/el_alquimista_coelho_gratis.pdf
- https://s3.amazonaws.com/zabejuvijolu/5074330740.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ebb6.bin` `c509fe98404f2d33ba379a43dcc5f4ae8dfa0c61d166992f7047e30786abeec9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBB6	5676 bytes
`font_01_sfnt_off0000ff0b.bin` `bbbbf6715d63ebd03087349beac6493487dd2b6a923a73607dab3950ae895317`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF0B	10472 bytes

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