PDF malware analysis — malicious · 2e394eba679ae9e5

MALICIOUS

PDF

71.8 KB Created: 2021-02-22 08:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 768de03add8607bb022ed21e0eca2bcc SHA-1: cea39f08ce3f30befa75a3f5d124f63ad9ef2476 SHA-256: 2e394eba679ae9e51922f5476fd2bdf0b7ab3782679fab8e2e376f175984fa22

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. The document body, though heavily obfuscated, contains references to 'pandemic game' and 'wkhtmltopdf', suggesting a lure to potentially malicious content. The presence of multiple suspicious URLs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE

PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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://maypoin.ru/123?utm_term=how+to+play+the+pandemic+game PDF link annotation
- https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/zunasulotu-jijosamuzazixev-bomegesidava.pdfIn PDF document text
- https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/xegevef.pdfIn PDF document text
- https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/673616913.pdfIn PDF document text
- https://cdn.sqhk.co/vafegijateno/ccE8Qjg/idle_air_force_base_cheats_ios.pdfIn PDF document text
- https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/bukumaki_xusigami_subikoziborek_bujowarupak.pdfIn PDF document text
- http://bomezifubaf.iblogger.org/zoluw.pdfIn PDF document text
- https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/molabu.pdfIn PDF document text
- https://tinabatof.weebly.com/uploads/1/3/0/7/130776088/8034224.pdfIn PDF document text
- http://managerprogram.live/kifedopaxokanezidasefi3epk.pdfIn PDF document text
- https://cdn.sqhk.co/bikegola/XCzhhWL/novusu.pdfIn PDF document text
- https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/6c290.pdfIn PDF document text
- https://cdn.sqhk.co/xubupigegi/h10hchc/8140755124.pdfIn PDF document text
- http://livecopyrightverification.com/zigubezaworibuvhldnb.pdfIn PDF document text
- http://winsl.space/nonopelazomapiwap7dcn9.pdfIn PDF document text
- https://zosumomaxin.weebly.com/uploads/1/3/4/0/134040430/bemegilupanobux.pdfIn PDF document text
- https://gedepaxu.weebly.com/uploads/1/3/1/3/131378821/3865823.pdfIn PDF document text
- http://dvestideyli.xyz/application_architecture_design_document_templatele3bo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://vudagolefedofa.epizy.com/mifuratibage.pdfIn PDF document text
- http://zaxutakizet.epizy.com/60585011944.pdfIn PDF document text
- http://revuzulikasulo.epizy.com/bollywood_actresses_photos.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_off0000dbc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBC1	5368 bytes
SHA-256: `921c77a58720ca27322e217653f518d9b488066af6bc533829664c6018d76ef2`
`font_01_sfnt_off0000edfb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDFB	10656 bytes
SHA-256: `a881d4778b07354789988b3d7a512c2b293943e137c66d51ec99b9753e89b6fb`

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