PDF malware analysis — malicious · 2b1a714d7239f290

MALICIOUS

PDF

132.3 KB Created: 2021-05-27 11:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 817c302838fe440a5865d42ba1ad22ad SHA-1: 264040aaf856d5af598260831d6e461ec42c729e SHA-256: 2b1a714d7239f290d4da41921f1fa861a25c6b8e52c1744be2ae9a61cda23a14

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution lure, specifically masquerading as a driver download. The presence of a large number of external links, many pointing to PDF files, suggests a link farm intended for SEO manipulation to attract unsuspecting users. The primary malicious URL identified is https://jottigo.ru/strik?utm_term=qhsusb_bulk+driver+download+windows+7+32+bit, which likely serves as a gateway to further malicious content or downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/strik?utm_term=qhsusb_bulk+driver+download+windows+7+32+bit PDF link annotation
- https://gijudopit.weebly.com/uploads/1/3/5/3/135321477/4457814.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393752/normal_6024163bbf7b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464053/normal_5fd6458dbdc31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460981/normal_60623b4abb047.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488581/normal_605185484f357.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370285/normal_605fc0fe151af.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470221/normal_60463f9c43315.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470537/normal_600aca1f1d3a3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416305/normal_6041749c48f9d.pdfIn PDF document text
- https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/tinedojusewuxali.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454678/normal_601867fb30742.pdfIn PDF document text
- https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/0b27fbc3b6514.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382407/normal_60113b6977aa5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381748/normal_5fda0f3d9ddc3.pdfIn PDF document text
- https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/gizelidekizugeli.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484821/normal_6062f1c8cfe31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472788/normal_600b90d8c47fb.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/45785aa8-2838-48de-8813-8cb96d487f1b/basidu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ed7875dc-a53e-450b-86ee-c34bbd04025d/valikonuzogunizitetum.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/95c8e0e5-1989-4848-9815-47892126dc99/100_to_1000_numbers_in_words_in_tamil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6861af72-bffb-4ad1-b874-deba7b5a917e/50226678536.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9133c386-b57e-403a-9f85-97c865019ecd/bloons_td_battles_mods_mac_download_pc.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e496dddb-56e9-4ff3-a777-54057ddcda96/wozamefijutubomad.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_off0001ae95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1AE95	5736 bytes
SHA-256: `9b8100e708fde6673ebbb14dd414fbbeb27d172f94f26bf5020889cc908f646d`
`font_01_sfnt_off0001c232.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C232	12892 bytes
SHA-256: `3fb8ad38f861be7a28db7881e9b0ea9602465d3bc6cb3d1f2d27d30ca9c1f257`
`font_02_sfnt_off0001edd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1EDD0	16132 bytes
SHA-256: `8b532151fe769c1181904960e3a4432ca5d771c506e475b103be3a742759c338`

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