PDF malware analysis — malicious · 3761d8345833e943

MALICIOUS

PDF

35.6 KB Created: 2020-11-06 05:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 17b051c890e47a1f47c67df8a32938a4 SHA-1: 98e335ee799b158f871016d53070c7d14ed7bdd9 SHA-256: 3761d8345833e9434ffe9918dcaac7bd10f5b0c0a7e278e441792a2a0d5863eb

76 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://trafficel.ru/123?keyword=collections+textbook+8th+grade+pdf+free PDF link annotation
- https://cdn-cms.f-static.net/uploads/4408983/normal_5f95c0505a31a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408721/normal_5fa1bcd63d361.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408004/normal_5f9ad38b3a525.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368493/normal_5f8c28c1c340b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366964/normal_5f8aaee423199.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/mijedusovineti/xigev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4e01ec1e-15d6-4653-97bc-7d897660a2c9/freemie_closed_system_collection_cups_review.pdfIn PDF document text
- https://s3.amazonaws.com/vavapekadoliti/gokalavirum.pdfIn PDF document text
- https://s3.amazonaws.com/lejivugeleguwod/vifurupinuf.pdfIn PDF document text
- https://s3.amazonaws.com/levovod/livimosodegirevalov.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/88f30e8d-3d4e-4fb6-9f2c-342d6ecff245/mofiponun.pdfIn PDF document text
- https://s3.amazonaws.com/vuraradaso/jijej.pdfIn PDF document text
- https://s3.amazonaws.com/zumomasugipeno/40482106469.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_off000048f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48F8	5788 bytes
SHA-256: `75f9df02cd9b11d11633dcfa0063ca8ae17bef6952bf6c170d2d3388e121f049`
`font_01_sfnt_off00005ca5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CA5	10212 bytes
SHA-256: `b0626b01623a789565ba8b64e98ced03652356dc361d2d7fe3de645c4e48d8b6`

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