PDF malware analysis — malicious · 40e45fed02701a33

MALICIOUS

PDF

76.6 KB Created: 2021-05-26 06:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 71f60fa2ebba5832bf4241e82bdfeb25 SHA-1: b1ac903710f94312e455b0a97940df4438a8ff4b SHA-256: 40e45fed02701a330c933e794218c71ee62e2f0ef61b6d43268e7a6ade02892d

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://xajibur.ru/strik, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://xajibur.ru/strik?utm_term=ver+voces+inocentes+pelicula+completa+hd PDF link annotation
- https://cdn-cms.f-static.net/uploads/4490369/normal_60372dcdebdfe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449627/normal_605fbd7ec11a0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367275/normal_6044656386d10.pdfIn PDF document text
- https://kilekefaze.weebly.com/uploads/1/3/4/6/134631798/9b8265b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378613/normal_606c8beeb4341.pdfIn PDF document text
- https://visizejafu.weebly.com/uploads/1/3/6/0/136093068/7546817.pdfIn PDF document text
- https://futuziduxe.weebly.com/uploads/1/3/4/5/134508203/xufanijaj.pdfIn PDF document text
- https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/kipovudag.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471256/normal_606948b6742bb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410443/normal_60453a07aec70.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401519/normal_6045116ac01e1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379032/normal_6029ae4850a57.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418000/normal_6056f2a022a6f.pdfIn PDF document text
- https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/ravodo-xujenelox-fibomapeje.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369802/normal_606d47b271a69.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382190/normal_5ff69b91bb640.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458852/normal_60553442bf1e4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389793/normal_5fff425f78be2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/dcd5f2fe-b85b-4714-b7f1-dab4740d8302/how_to_use_a_ronco_food_dehydrator.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0b2fd8e0-5160-4626-b6f2-f7905aeafd60/vanity_fair_nightgowns_amazon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1cd37b01-ea5b-43f2-96e0-3e4f63541dcd/air_force_1_pixel_desert_sand_for_sale.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d02793d-32b5-450b-acda-46fb2d177f93/federalist_72_summary.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/07d00663-e032-48e4-8bcc-d080ca6ff736/dakobojuwume.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0099b99f-f0bd-4d09-96b1-753f0afd1d30/pidorewisuf.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8ebee494-4ab2-47df-8bf7-9f2485eb0ea1/how_to_connect_jabra_talk_45_to_iphone.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_off0000e504.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE504	5340 bytes
SHA-256: `7a3a2f6a04a13488e8280a4fa318f1c31e829a68b22fd57a2bded307bcd5267f`
`font_01_sfnt_off0000f701.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF701	2080 bytes
SHA-256: `041fb338776cc2c4fdf02ef8dc738f2ca586166e2fdd6942bea705876f8091c4`
`font_02_sfnt_off000100c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C5	10704 bytes
SHA-256: `c659da9fd11dc0912471032a8c337d5660b761d0a791791c7a9e21d231d64cce`

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