PDF malware analysis — malicious · 5c2584e8ff1bec3d

MALICIOUS

PDF

78.5 KB Created: 2021-03-10 12:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 00a37aeaf1d8206c7ee23d9d51bd2452 SHA-1: fee4321dba5bcd68f20bfc25bc5c0259d624ee2f SHA-256: 5c2584e8ff1bec3d81b47002f9a57a61fcd2e36f93c68db2e2d17b7b7b2f6a42

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The document body, though heavily obfuscated, suggests a lure related to a 'repair manual'. The presence of numerous external URIs, many hosted on disposable domains, points to a link farm designed to redirect users to malicious content, likely a second-stage payload. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

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 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://midufefew.ru/wix?keyword=2012+vw+cc+repair+manual PDF link annotation
- https://cdn-cms.f-static.net/uploads/4470387/normal_5fe82d37cb346.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4478408/normal_5fc75462e145b.pdfIn PDF document text
- http://nafepuzemobir.sportsontheweb.net/us_navy_uniform_regulations_warfare_devices.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451737/normal_5fcae59b09bea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446925/normal_60138693df8d4.pdfIn PDF document text
- http://pedazupemadid.22web.org/find_your_routers_ip_address_guide.pdfIn PDF document text
- http://wedidizelajat.mypressonline.com/25911368662.pdfIn PDF document text
- http://mesutilixuta.sportsontheweb.net/personification_definition_and_examples.pdfIn PDF document text
- http://vobafoselalulor.mypressonline.com/mexabokumaradot.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4406812/normal_5fe05321f3445.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://vawirir.atwebpages.com/nubigunitilalex.pdfIn PDF document text
- https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_b4fcd14291e2447e8d2852df3e8410e8.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/niwotipugonuvoz/92411977058.pdfIn PDF document text
- http://pemaravodowo.rf.gd/introduction_to_stochastic_calculus_for_finance.pdfIn PDF document text
- https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_80d03c8a3d1e478fa2a7eee124363329.pdf?index=trueIn PDF document text
- https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_5e4ae12a07104d58a09ab2a1a4492383.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gasodamuza/what_is_the_best_roomba_mop.pdfIn PDF document text
- https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_957e1d5a6b294deaa2ad96720df67b7c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bulujono/94992302578.pdfIn PDF document text
- http://nijetazum.epizy.com/ejemplo_de_guion_teatral_corto_para_nios_con_sus_partes.pdfIn PDF document text
- https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_86b86efb0500447aac8d2d46cabb3bb2.pdf?index=trueIn PDF document text
- https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_d20ef238ee454d3ca91c27597e39c850.pdf?index=trueIn PDF document text
- https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_f166bb884e2f4b26a52047ac4f26d19e.pdf?index=trueIn 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_off0000f2d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2D1	5284 bytes
SHA-256: `84dd27242696ef80dfb9d8ec69444c3fc5e80f827664ed8b3d335541f8b89b9e`
`font_01_sfnt_off000104cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104CD	12572 bytes
SHA-256: `8dbebeaafaa3d0bb0dd6eafa9c3a0dfdd85d37107a27fb5469ae7cf9a36ad70a`

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