PDF malware analysis — malicious · f798e37f3e46c89a

MALICIOUS

PDF

71.5 KB Created: 2021-03-13 23:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 39d99a9276da1bbb5bdb678ec711fc2e SHA-1: ee7dbee581cabeb261310dc87e63abc56266d98f SHA-256: f798e37f3e46c89a38805977e7b95eb4b43a9ba6bfea325a06bea1775c29dcfe

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lead the user to a compromised or malicious external resource.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://fokemale.ru/wix?keyword=robot+laser+battle+unblocked PDF link annotation
- https://pusixeraz.weebly.com/uploads/1/3/2/6/132681440/8265410.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413467/normal_5fd17e174e603.pdfIn PDF document text
- https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/705cc13.pdfIn PDF document text
- https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/nowixur-dufujir.pdfIn PDF document text
- http://noksipals.online/peter_pan_jr_musical_scriptj98nx.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413975/normal_5ff81c2ac0b64.pdfIn PDF document text
- https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/mejuj.pdfIn PDF document text
- https://likobikumenaf.weebly.com/uploads/1/3/5/9/135961418/jazavusenifuti_dorefifizo.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489838/normal_5fca212cd8a66.pdfIn PDF document text
- http://newsportstechnology.ru/rutaluwogirerm6sty.pdfIn PDF document text
- http://lijamerogavex.iblogger.org/79057956719.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489843/normal_600361b0290f2.pdfIn PDF document text
- https://jejaparax.weebly.com/uploads/1/3/5/3/135332208/lumomujepukuxe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422372/normal_5fcc031619b8e.pdfIn PDF document text
- http://poradoit2.site/bozunokutipd30us.pdfIn PDF document text
- https://javubabajekav.weebly.com/uploads/1/3/5/9/135957287/8455441.pdfIn PDF document text
- http://salestore.pro/15686493212fqxv6.pdfIn PDF document text
- http://mebets.xyz/zaxivexoxomuxadez0r319.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
- http://verepuremi.rf.gd/agence_immobilire_formation.pdfIn PDF document text
- http://volififujuwimi.epizy.com/colchester_sixth_form_phone_number.pdfIn PDF document text
- http://lovupitofenux.rf.gd/rofupilelatavelol.pdfIn PDF document text
- http://posewabenuxinot.epizy.com/52897595591.pdfIn PDF document text
- https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_0b4c90b00deb42a794675778f0baa882.pdf?index=trueIn PDF document text
- https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_1d88e7bbea014202a7e69cbbe053f7d1.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF3B	4980 bytes
SHA-256: `42412251848709a18c1f6365d7d0f080764f05c1a425364cd68791287da5da1e`
`font_01_sfnt_off0000e031.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE031	9900 bytes
SHA-256: `453ed0c38ee0e411a5bb31624bf41364c21c35be898ecae6a09b5edd7c5080c8`
`font_02_sfnt_off00010229.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10229	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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