PDF malware analysis — malicious · f077a6d7246d0cfe

MALICIOUS

PDF

95.5 KB Created: 2021-05-23 16:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 9e799529a2e4ee6bfb7080c102bdd0e8 SHA-1: ac58d50a5289e612bcb2b06d1e5f6c84895f7ed3 SHA-256: f077a6d7246d0cfe78af5093ec9deda3d21f359ae8c6a39d8b31b83af5e171f9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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.
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://jumiwimov.ru/strik?utm_term=transfert+thermique+conduction+exercice+corrig%25C3%25A9+pdf PDF link annotation
- https://nimukebobe.weebly.com/uploads/1/3/4/5/134527887/2830822.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420610/normal_600a7e1d80eaf.pdfIn PDF document text
- https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/1521537.pdfIn PDF document text
- https://felekiki.weebly.com/uploads/1/3/4/6/134689652/lozax_pifiran_vujaw_fafux.pdfIn PDF document text
- https://jewesorovusupim.weebly.com/uploads/1/3/6/0/136092124/6690924.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388820/normal_5fd3bdd0c10fb.pdfIn PDF document text
- https://foxidaxoluw.weebly.com/uploads/1/3/4/0/134016742/gatodopopuvexav.pdfIn PDF document text
- https://vewominejijisos.weebly.com/uploads/1/3/6/0/136053907/4492452bb7c88ea.pdfIn PDF document text
- https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/kijuwimemesip.pdfIn PDF document text
- https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/faloludawe.pdfIn PDF document text
- https://tepadomuxufebe.weebly.com/uploads/1/3/1/3/131382092/bugamugawokiw.pdfIn PDF document text
- https://xadifera.weebly.com/uploads/1/3/1/4/131438156/tobemonilapek_xebir.pdfIn PDF document text
- https://tubadelemifevit.weebly.com/uploads/1/3/4/5/134509228/xokakaximufek.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424013/normal_60291cdcaf866.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/bokelur/56642827727.pdfIn PDF document text
- https://s3.amazonaws.com/radubozufiwo/mukek.pdfIn PDF document text
- https://s3.amazonaws.com/nigimul/30795508160.pdfIn PDF document text
- https://s3.amazonaws.com/fikuvine/wejemojamixukero.pdfIn PDF document text
- https://s3.amazonaws.com/zikeko/68436930798.pdfIn PDF document text
- https://s3.amazonaws.com/musokejixami/answer_to_my_math_word_problem.pdfIn PDF document text
- https://s3.amazonaws.com/mokixetat/how_to_trade_on_metatrader_4_demo_account.pdfIn PDF document text
- https://s3.amazonaws.com/wixatax/dr_coldwell_stress_reducing_techniques.pdfIn PDF document text
- https://s3.amazonaws.com/wonumafubij/68986471678.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011776.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11776	5820 bytes
SHA-256: `5f906f36394b7e36f2fa55eb14979fae94a8fe4112efeb80625cfaf7f544f459`
`font_01_sfnt_off00012acb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ACB	14148 bytes
SHA-256: `e196c69a2bdc64596781bbd7b4387922caef54a9473543ee41d14a18a6db29aa`
`font_02_sfnt_off00015873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15873	16136 bytes
SHA-256: `be55bb759cecb0f764b80cd4e0c9ab373909be42783b5cd95b70cbd4acbd3f00`

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