PDF malware analysis — malicious · cd36512686f5b5df

MALICIOUS

PDF

73.9 KB Created: 2021-03-12 13:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: c09298456b34acf89bdc90790c397416 SHA-1: b76e01d129bcd56c51ccc0adb90e515c0c394274 SHA-256: cd36512686f5b5dfebea6ef35fa4b53bc4ea54b9967d6d2ec2c7d34e505d9e00

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The embedded URI 'https://gimoguvi.ru/strik?utm_term=dell+inspiron+n5010+compatible+memory' is particularly suspicious, indicating a potential lure for users searching for specific hardware components. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=dell+inspiron+n5010+compatible+memory PDF link annotation
- https://cdn-cms.f-static.net/uploads/4379973/normal_602682a1095ea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389582/normal_602ed52dba6cc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484812/normal_600e085136ea4.pdfIn PDF document text
- http://duguvazadiwifu.22web.org/17867305944.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485568/normal_603729fd1c895.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385617/normal_604aad4166294.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426830/normal_6026e38715da0.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://gunuguduwurenog.epizy.com/apple_iphone_company_profile.pdfIn PDF document text
- https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_c522ec1a3f814c21b2a978ccdd55b59c.pdf?index=trueIn PDF document text
- https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_e801dc9151b7461d9f728c19e264b138.pdf?index=trueIn PDF document text
- https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_f35fb01579ff46fa82ad273dafb0fbe7.pdf?index=trueIn PDF document text
- https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_6e8150a8165b4d13bbe9b427f0329976.pdf?index=trueIn PDF document text
- http://lanotiwigizoxep.epizy.com/tigoxepevevatazixo.pdfIn PDF document text
- https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_2372e5f6e2744cfe91e6666f9a06f6a9.pdf?index=trueIn PDF document text
- http://sonowodiguvab.epizy.com/arena_of_valor_taiwan_apk.pdfIn PDF document text
- http://bupelasupur.epizy.com/wasuxogug.pdfIn PDF document text
- https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_9bd5711f745040569a9511f7687d8b64.pdf?index=trueIn PDF document text
- http://pimizebogo.rf.gd/24269923.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d52c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD52C	5428 bytes
SHA-256: `a639de91acf59dd9725cb060aa908c6fa2c54b8e932bbcaa03c2c838a04fea46`
`font_01_sfnt_off0000e78c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE78C	10736 bytes
SHA-256: `575e5face3dd9df6d4ef8c20e8e356d9a86362ce2cd3fc27b49a3b1a13701abd`
`font_02_sfnt_off00010c35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C35	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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