PDF malware analysis — malicious · e6a008dd610e9a37

MALICIOUS

PDF

78.1 KB Created: 2021-02-20 11:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 298c86649ec187447febfea3782c6317 SHA-1: be503f3767954f6a7f9ed5d4c993ec3cfd351ea9 SHA-256: e6a008dd610e9a37316e700f7cd1eac1cd3af275c58e889ad61b2f66f7077be5

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 a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The embedded URL 'https://jottigo.ru/strik?utm_term=how+much+do+psychologists+make+in+texas+a+year' indicates a lure related to salary information, likely to trick users into clicking through to a phishing or malware distribution site.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=how+much+do+psychologists+make+in+texas+a+year PDF link annotation
- https://gosalojuwik.weebly.com/uploads/1/3/6/0/136050429/496fac1f61f.pdfIn PDF document text
- https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/47b14d5aefc76.pdfIn PDF document text
- https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/wodat.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463526/normal_5fef8a4827a4f.pdfIn PDF document text
- https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/komewif.pdfIn PDF document text
- http://ludshop.xyz/vukobz2t74.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455380/normal_5fda31f5c63bc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391634/normal_5fd2c7eb80f17.pdfIn PDF document text
- https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/2948318.pdfIn PDF document text
- https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/197f123b7e2.pdfIn PDF document text
- http://vejawezodasupax.22web.org/7196439801.pdfIn PDF document text
- http://redita.fun/3540338228bl332.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416504/normal_601f37fe2a9e6.pdfIn PDF document text
- http://all-system7.xyz/xavosawg9ip.pdfIn PDF document text
- https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/vaxuromaroniwo-xumaz-jitokukatazej-texonajis.pdfIn PDF document text
- http://magicwoolshop.com/pipe_roughness_tableiaajg.pdfIn PDF document text
- http://teaitalis.space/business_organisation_and_management_downloadeatiq.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://xenivut.epizy.com/ignou_date_sheet_2019_mah.pdfIn PDF document text
- http://fujirezidixivu.rf.gd/where_are_the_mounds_in_ohio.pdfIn PDF document text
- https://s3.amazonaws.com/divexikav/35890694025.pdfIn PDF document text
- http://kigotuzazelitij.epizy.com/xetixemedaduzuva.pdfIn PDF document text
- https://s3.amazonaws.com/pulujolatepuv/57291273768.pdfIn PDF document text
- https://s3.amazonaws.com/mawesenasijoser/kitexegijerefuzurogiwopiv.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF15	5776 bytes
SHA-256: `6fa92fb299a213739d2a474590814208c8c0f37ab4da06a02f296b9be880115c`
`font_01_sfnt_off000102ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102AB	11468 bytes
SHA-256: `3a13fe5963e2d00865aea7bf2b13705e076bc0d26d72440df2c3a49a2795156d`

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