PDF malware analysis — malicious · 403876da5177b74b

MALICIOUS

PDF

49.8 KB Created: 2020-11-07 23:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b3bad927dcd733890dfc2bbb61e79115 SHA-1: 197c02d9e6b93875e3169bea74ceaafdfb1d1c42 SHA-256: 403876da5177b74b0c305632de1bfd5894d602947febe9c68b9d59ff38f8e234

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is part of an advance-fee scam, specifically using a lure related to 'Steam code generator no survey 2018'. It embeds multiple external links, with one prominent URL pointing to a site that appears to be part of this scam. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE

Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
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://traffine.ru/aws?keyword=steam+code+generator+no+survey+2018
- https://cdn-cms.f-static.net/uploads/4366347/normal_5f9e9c9e19478.pdf
- https://cdn-cms.f-static.net/uploads/4365567/normal_5f987e81ce75b.pdf
- https://cdn-cms.f-static.net/uploads/4380881/normal_5f93f2a45f31f.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://rejavujizi.files.wordpress.com/2020/11/jikipivuvu.pdf
- https://uploads.strikinglycdn.com/files/7108597b-abf4-4b11-93d0-4e9d4634cf68/17336513139.pdf
- https://uploads.strikinglycdn.com/files/1c6a3161-cb10-4673-ba26-6d826f147c6c/36414038131.pdf
- https://uploads.strikinglycdn.com/files/95a18f82-c378-4787-8b5c-fffe706919e7/pubajijekaluxu.pdf
- https://s3.amazonaws.com/xisefowu/link2sd_plus_apk_no_root.pdf
- https://uploads.strikinglycdn.com/files/969b5db3-8f17-4cc1-ae90-789186d7c943/rivirekuzaduriguwuleduz.pdf
- https://uploads.strikinglycdn.com/files/ab35a9e0-60cf-48eb-9e13-ede0545a6ecd/64934270409.pdf
- https://s3.amazonaws.com/dabatisew/bioassay_of_acetylcholine.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007f6e.bin` `7f1c4bf5cd2f3a80336c37826730fa4bca0fe3adcd4a52fbd3fcfe93cf45e29f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F6E	6012 bytes
`font_01_sfnt_off000093da.bin` `438d77ea317ea803e2031c99748303970df70dd09555a0cfd07acade49faf500`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93DA	11352 bytes

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