PDF malware analysis — malicious · 27081d303b9b7523

MALICIOUS

PDF

57.1 KB Created: 2020-10-26 05:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 872dde062d5fe8863807e3cd59201954 SHA-1: 919908ad35aa2607fbde43766f23050b79915d79 SHA-256: 27081d303b9b7523860e0c9dd29e068030943cc4bd1e385c1ba6a43c56457098

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body and embedded links suggest a lure related to 'Examen de admision preparatoria pdf', likely a phishing or scam attempt to drive traffic to malicious sites. The presence of a password archive lure heuristic further supports the malicious intent, suggesting the document is designed to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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.
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
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://ggtraff.ru/strik?keyword=examen+de+admision+preparatoria+pdf
- https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/2702424.pdf
- https://digafixi.weebly.com/uploads/1/3/0/7/130776371/ed9112.pdf
- https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/4b872ef5dfc682.pdf
- https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/nusazog-bazamela.pdf
- https://rixapozati.weebly.com/uploads/1/3/4/4/134456921/xodanimonez.pdf
- https://mafogidafefuzu.weebly.com/uploads/1/3/4/3/134334422/3621635.pdf
- https://veraweno.weebly.com/uploads/1/3/0/7/130739577/firofamulosebuk-melikid-papivepuka-pojirom.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/temujonuwu/sant_gadge_baba_amravati_university_time_table_2019.pdf
- https://s3.amazonaws.com/wonoti/sunowow.pdf
- https://s3.amazonaws.com/tiluwisulepam/biomass_energy_conversion_technologies.pdf
- https://s3.amazonaws.com/susopuzupure/breathing_underwater_alex_flinn_free_download.pdf
- https://s3.amazonaws.com/leguvefu/fusatesatewaxesagik.pdf
- https://uploads.strikinglycdn.com/files/16f84926-a678-4793-8513-3b5780efe992/sugodujebaxudimuvajilaki.pdf
- https://uploads.strikinglycdn.com/files/eba31a6f-9aa6-4c6d-9a80-dc7b902315ce/80157456346.pdf
- https://uploads.strikinglycdn.com/files/9e7b9e49-da6a-4514-93b8-4717b77fde5f/35020239767.pdf
- https://s3.amazonaws.com/fodose/affichage_obligatoire_acm.pdf
- https://s3.amazonaws.com/buganabowumujef/vezuraz.pdf
- https://s3.amazonaws.com/sepawi/xa_trang_trong_bng_foxit_reader.pdf
- https://uploads.strikinglycdn.com/files/c843888b-2d3f-468d-9d30-5dc84db3cbfa/duzobewufunirejubape.pdf
- https://uploads.strikinglycdn.com/files/3c78db82-1d2f-4ad4-9b93-2b8c5908164f/wayfinder_s_guide_to_eberron_free.pdf
- https://uploads.strikinglycdn.com/files/278bb506-3406-40ed-992c-174c2cbd9568/jolumetit.pdf
- https://uploads.strikinglycdn.com/files/10bfa266-389b-43f5-b10d-2a3e1a0f5979/27391820775.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
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007812.bin` `6c77a6234a4e1d7038b964e578d35a7d841c52c3d3d89face41d008842862e9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7812	4968 bytes
`font_01_sfnt_off000088e0.bin` `2989587e629d67aef9b2bf957934494b871de6cbbc16458536dd98066b04be1f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88E0	12156 bytes
`font_02_sfnt_off0000b01c.bin` `06bfa64ed12717283f495571c92278345f747a953fdc6b13f07550a629f515e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB01C	16492 bytes
`font_03_sfnt_off0000c674.bin` `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC674	4324 bytes

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