PDF malware analysis — malicious · a4e9efaed311c963

MALICIOUS

PDF

43.1 KB Created: 2020-10-30 15:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 2c78dc61a543fc92b3e711c191f524a0 SHA-1: bc9e650bd9ccb34fe071ffc83fceb3541bfefb70 SHA-256: a4e9efaed311c963fb81404bdad4c873c2ab91f1488f358cca6e553eddbb802c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://cctraff.ru/strik?keyword=refrigeration+piping+handbook In PDF document text
- https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/mupuzuzilitemak.pdfIn PDF document text
- https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/3029088.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407747/normal_5f936eeee9d06.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/694c78d5-9826-4c24-868c-2b253502ab69/23445990267.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb77d88c-d0ed-4b69-9a30-0c8362595947/gagadupiziraxafisufiso.pdfIn PDF document text
- https://s3.amazonaws.com/luropi/invacare_reliant_450_hoyer_lift_manual.pdfIn PDF document text
- https://s3.amazonaws.com/jamokaroxoj/xifuwuraluwabolekoneloluw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/35956e48-8682-48eb-b900-6fecce45d400/nuzonupokoruzopu.pdfIn PDF document text
- https://s3.amazonaws.com/fatikonavori/kabosuwavonedijipusazaw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/443f7af6-7e21-49cb-80c2-d34bef0210be/36613482745.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1633b111-1222-4207-974e-766028a4a362/what_is_a_pedicab_driver.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/4489/5392/files/prenatal_development_study_guide_chapter_5.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f5a7a6b2-c44b-41e4-b8a7-bf97844f1bd3/dikatifonivurolomupoki.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_off0000697b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x697B	5304 bytes
SHA-256: `5e9494926e67aaab76464ee621bc8e23847e7dd0450afb62500016fc6fd2631f`
`font_01_sfnt_off00007b82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B82	10584 bytes
SHA-256: `1adcc252d45624ed7bba3b1badcd5c580e260f55fe0112b01face9e375c1d495`

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