PDF malware analysis — malicious · a0ca6851e72a98f0

MALICIOUS

PDF

80.3 KB Created: 2020-12-21 21:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 9a67a3a73db930e26921c4c786ab91c6 SHA-1: 31cc08f35c8cd4064648f81b8f405016e72dd5f3 SHA-256: a0ca6851e72a98f0a0ac89b239240e13aeeb52a18259aab798d155a947c1e1fd

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan. The embedded URLs, such as 'https://traffine.ru/strik?utm_term=stick+fight+shadow+warrior+hack', likely serve as entry points to further malicious activity or SEO spam.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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.
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://traffine.ru/strik?utm_term=stick+fight+shadow+warrior+hack PDF link annotation
- https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/7970521.pdfIn PDF document text
- https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/bubelubijun.pdfIn PDF document text
- https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/4622772.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383302/normal_5fd8b93a1d1cc.pdfIn PDF document text
- https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/jevujasoder.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420018/normal_5fdbbc61408c9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415292/normal_5fb940766c8d4.pdfIn PDF document text
- https://jujizifij.weebly.com/uploads/1/3/4/3/134309807/f8ad2.pdfIn PDF document text
- https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/9700181.pdfIn PDF document text
- https://womukowewefe.weebly.com/uploads/1/3/4/8/134889771/6690105.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/71f69c35-3631-4569-9a3f-72de2aafa3f2/takufexagixilogurad.pdfIn PDF document text
- https://s3.amazonaws.com/zunaduxa/the_timekeeper_mitch_albom_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/717b6f6b-e26e-480e-8df2-2241dc7312b4/menojusegoberowid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01f5a828-2e69-4cf8-87d1-2d1df9ea2c67/expanse_season_5_trailer_music.pdfIn PDF document text
- https://s3.amazonaws.com/sazariwapa/jean_baptiste_colbert_book.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d254.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD254	5076 bytes
SHA-256: `67ceee8315b5df4f8381dc9b60c348220c3c687fd3fc40292d17eca4d90b91c4`
`font_01_sfnt_off0000e3ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3AC	13480 bytes
SHA-256: `283b003e7b649d33722a0c8817bb401b45944880e3bcf4e1245305046357cd44`
`font_02_sfnt_off00010e16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E16	16436 bytes
SHA-256: `de2f3122a1bfa7bb689c0050289bcf8aa11e61750700b24fa46ee22545712239`
`font_03_sfnt_off00012434.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12434	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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