PDF malware analysis — malicious · 7cf3ad9f77316535

MALICIOUS

PDF

77.9 KB Created: 2020-12-25 13:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 8282d9026eea494c95c053fe021a8502 SHA-1: 6ba5ce0a03e7cdd87d284ea3aa95d6ddc3c9f07b SHA-256: 7cf3ad9f77316535a0f78dea8d637c0b46e1491fa901da8cd2bcf7edb4375958

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Playstation vr games shark', indicating a lure to attract user clicks.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=playstation+vr+games+shark PDF link annotation
- https://static.s123-cdn-static.com/uploads/4366045/normal_5fc9cce88e8e1.pdfIn PDF document text
- https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/vawokonufelo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412396/normal_5fa055b4ee4de.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384471/normal_5f90028b8fea6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488604/normal_5fd91708a7a27.pdfIn PDF document text
- https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
- https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/lanikolofurodox.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377114/normal_5fb84720ad050.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368237/normal_5f89d37923efb.pdfIn PDF document text
- https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/65fcb.pdfIn PDF document text
- https://sanevofodi.weebly.com/uploads/1/3/0/9/130969150/vasutusobosulo-wojuwabelesos-nerufiw.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487201/normal_5fbf40120c71c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388614/normal_5f95b36469e61.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481999/normal_5fc87e817d2a3.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://s3.amazonaws.com/fasanag/emotions_definition.pdfIn PDF document text
- https://s3.amazonaws.com/najubu/gasometria_arterial_2019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b4c9b932-1b06-4921-81ca-e35205702ab0/80752516440.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_off0000e824.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE824	5116 bytes
SHA-256: `cd0e5bb0f52146402f8cc28d1db359e35fd45ad2622b29ffc989fff4de441f63`
`font_01_sfnt_off0000f958.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF958	10316 bytes
SHA-256: `33c140518b21adce3ae101c99eb95ea7c4159c3eb6832b6df3fd62fe6cf52c7f`
`font_02_sfnt_off00011c96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C96	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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