PDF malware analysis — malicious · 694e76353bf6fb87

MALICIOUS

PDF

79.8 KB Created: 2021-05-21 19:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 0a4185f4f21afd78819e1c92606fda3e SHA-1: a4fef9977c01e7ad64a4c9b05667c0f28d2d9109 SHA-256: 694e76353bf6fb87c0355f0cedd5166fe5ffc33007fdb20999ce1914a54ba9af

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm, with the primary malicious URL being https://fokemale.ru/strik. This suggests the document's purpose is to redirect users to potentially malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=identify+independent+and+dependent+variables+in+an+experiment PDF link annotation
- https://puxodupewuna.weebly.com/uploads/1/3/0/7/130739405/6307106.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366947/normal_601e43ea29b32.pdfIn PDF document text
- https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/gipizageturalixe.pdfIn PDF document text
- https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/2734708.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490534/normal_60530a36a86e5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366010/normal_604d88f4a4dc8.pdfIn PDF document text
- https://razisosip.weebly.com/uploads/1/3/0/7/130739291/5340379.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/300110a1-4602-4517-be39-0be2f81669e2/star_trek_25th_anniversary_manual.pdfIn PDF document text
- https://s3.amazonaws.com/foneniz/border_light_apk_pro.pdfIn PDF document text
- https://s3.amazonaws.com/kuxuxemu/xemamigo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eceb5ab0-d83f-475d-86c0-0fbc6a0a4678/the_flavor_bible_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e3799663-22ee-4e5d-a771-4781b21c882b/99733669639.pdfIn PDF document text
- https://s3.amazonaws.com/fosawef/game_dev_story_apk_full_version.pdfIn PDF document text
- https://s3.amazonaws.com/vososasoxumete/piriform_ccleaner_deutsch.pdfIn PDF document text
- https://s3.amazonaws.com/norozovijalu/imagenes_de_manualidades_de_halloween_para_nios.pdfIn PDF document text
- https://s3.amazonaws.com/vosimalume/pufisanobovulefawafages.pdfIn PDF document text
- https://s3.amazonaws.com/zedilegol/24352075345.pdfIn PDF document text
- https://s3.amazonaws.com/wolina/31895200311.pdfIn PDF document text
- https://s3.amazonaws.com/gomakobez/android_in_app_billing_permission.pdfIn PDF document text
- https://s3.amazonaws.com/salade/rufewe.pdfIn PDF document text
- https://s3.amazonaws.com/pomaxa/elvis_cant_help_falling_in_love_letra_traducida.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e528.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE528	5496 bytes
SHA-256: `e7ccd07be6cc1e6b115c653fb848831a9cef53165e64070800b2365c56d702bf`
`font_01_sfnt_off0000f7d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7D3	10572 bytes
SHA-256: `994b64592e174cf8a3a26a1e5972985cc68a80b06247e2ada6f0f1718410ed98`
`font_02_sfnt_off00011c17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C17	16144 bytes
SHA-256: `18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b`

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