PDF malware analysis — malicious · cea587bfc1ec92f9

MALICIOUS

PDF

67.7 KB Created: 2020-11-29 14:17:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5e53b53a3447458fde96ade3e8dbacf7 SHA-1: 14426405e4d7f176efea0868045c7df1ba1827c5 SHA-256: cea587bfc1ec92f9df54f7bac55421740b2791e128cba8819b0df20fde32c7a6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many of which point to link farms, suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards an attempt to redirect users to malicious or spam content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=lactic+acid+forming+bacteria
- https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/9a369b84.pdf
- https://cdn-cms.f-static.net/uploads/4365553/normal_5fb2c065924a9.pdf
- https://fuzujaloxoz.weebly.com/uploads/1/3/4/6/134684853/f7b33649da11.pdf
- https://cdn-cms.f-static.net/uploads/4424953/normal_5fa5aeba9723e.pdf
- https://cdn-cms.f-static.net/uploads/4413719/normal_5f9bb02316c21.pdf
- https://cdn-cms.f-static.net/uploads/4392462/normal_5fa93e5b91b47.pdf
- https://wajegeteb.weebly.com/uploads/1/3/4/8/134896445/d846996ec0f.pdf
- https://vavemome.weebly.com/uploads/1/3/4/6/134609594/tilawusexowag_tirosagivabus_nadedifo_vawirapelewida.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/sojuravewi/52552053630.pdf
- https://s3.amazonaws.com/neviwove/cookiecutter_python_templates.pdf
- https://s3.amazonaws.com/mijedusovineti/magaxivuradunavelijawen.pdf
- https://s3.amazonaws.com/vufupu/44508239990.pdf
- https://s3.amazonaws.com/vixuwogetiv/android_button_align_center_vertical.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_off0000cc36.bin` `b468a060077e1dbb2773f5fac6d3ae19240190dd302861f150c04e075dffb015`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC36	5212 bytes
`font_01_sfnt_off0000dde2.bin` `f93179abc15e232fb007692f056843b848ae27ef78ce2e2cf75532a2fe0c0b92`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDE2	10652 bytes

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