PDF malware analysis — malicious · 9fcefd45f535b99f

MALICIOUS

PDF

74.9 KB Created: 2021-02-21 02:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: da78d1bc43cadb9173f237c701b0ff9b SHA-1: 05b635210e02e7bf3ad4896c0f9d6d4733e26255 SHA-256: 9fcefd45f535b99f78abb2bccf4b699b68d19d3b7fdf8d7ed5a5750ab3a81b01

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO poisoning or to distribute further malicious content. The embedded content, though heavily obfuscated, indicates the document is designed to redirect users to these external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=taylor+polynomial+calculator+emathhelp PDF link annotation
- https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/sewasegakitugaz.pdfIn PDF document text
- https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/691359d.pdfIn PDF document text
- https://gavozosalaz.weebly.com/uploads/1/3/1/1/131163920/8696185.pdfIn PDF document text
- http://nesobaka9.xyz/ondalk_kesirlerde_blme_ilemizc237.pdfIn PDF document text
- http://delaem-sami.online/bachelor_degree_in_information_technology_south_africab51jl.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392860/normal_60129212b213a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479902/normal_5fe80e18a01d2.pdfIn PDF document text
- https://kevofogag.weebly.com/uploads/1/3/5/9/135962027/surer-givogujisozeta-fagisanozevij.pdfIn PDF document text
- http://rumajasajobotod.iblogger.org/aurora_store_apk_2019.pdfIn PDF document text
- https://luxabilep.weebly.com/uploads/1/3/0/8/130873941/gejad-jemokiwakopaj-pelodak-kisixixizab.pdfIn PDF document text
- http://kismykeitio.best/warriors_cats_nameswk0va.pdfIn PDF document text
- http://xasujaru.22web.org/vuvifegabawevuruja.pdfIn PDF document text
- https://xisasuwida.weebly.com/uploads/1/3/4/4/134472621/78584722c7bfa73.pdfIn PDF document text
- http://amsidisi.xyz/padorapiod80v.pdfIn PDF document text
- http://trudogoliya.online/82458653909e9abu.pdfIn PDF document text
- https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/letaxabijiril-bakasikawusoz-tusuge-luwoxegunoge.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4478134/normal_6004f0b3717e2.pdfIn PDF document text
- https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/gozepatutonuv.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/sorogamat/english_speaking_app_now.pdfIn PDF document text
- https://s3.amazonaws.com/setikizo/android_sdk_platform.pdfIn PDF document text
- http://garapaf.epizy.com/airliners_forum_trip_reports.pdfIn PDF document text
- https://s3.amazonaws.com/fuzafuzeruwit/63136570343.pdfIn PDF document text
- http://getorimojaz.rf.gd/labajotiburizemodiga.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_off0000e638.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE638	5048 bytes
SHA-256: `229f229937f0654f51663d57826bc560b9f1308134fdda741fc03a71cb4ee266`
`font_01_sfnt_off0000f740.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF740	12392 bytes
SHA-256: `02756a9565c4887d63ab0295859d687dd0f7883350a1906108443b2e71e874a3`

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