PDF malware analysis — malicious · aa40dbd6db9e0a29

MALICIOUS

PDF

79.3 KB Created: 2021-04-01 06:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: ca0fc5c766e4828530a869618d6f905a SHA-1: 267e9b3a2c3b7ad928d096338d96d2b7b695f9dd SHA-256: aa40dbd6db9e0a29293e5a71640837cd2659b8be3dad093bfcb4fc4fd7b26e94

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure (dafemum.ru). The document body, though heavily obfuscated, appears to contain text related to search queries, suggesting a phishing or scam lure. The presence of numerous links on disposable hosting further supports this, indicating an attempt to drive traffic to malicious sites.

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
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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://dafemum.ru/strik?utm_term=how+high+does+a+bat+house+need+to+be In PDF document text
- http://pulibibebobo.iblogger.org/atletismo_pruebas_de_campo.pdfIn PDF document text
- http://olx-delivery.cc/taxadelonomufetibexojebadf2.pdfIn PDF document text
- https://cdn.sqhk.co/fegibidizog/biinfie/rarazutomeborunowivamev.pdfIn PDF document text
- http://monongzhlh.space/a_snow_fort_too_far0oreb.pdfIn PDF document text
- https://cdn.sqhk.co/tokebamojos/mhegjbQ/rome_total_war_cheats_units.pdfIn PDF document text
- https://cdn.sqhk.co/wesuwajil/Y0hg9je/art_therapy_salary_payscale.pdfIn PDF document text
- https://cdn.sqhk.co/gefimiwotux/qsj8qha/pijosopodofumaw.pdfIn PDF document text
- https://cdn.sqhk.co/tumosirewuw/gdNuEgi/rush_hour_karting.pdfIn PDF document text
- http://shtangelkipokupkiitd.online/abc_song_music_sheetp620m.pdfIn PDF document text
- http://tojubilabesi.22web.org/how_a_land_grant_works.pdfIn PDF document text
- http://cocobuka3.xyz/girl_next_door_saving_jane_taylor_swiftf9owt.pdfIn PDF document text
- https://cdn.sqhk.co/votezevon/jjEgfDF/kuledawubu.pdfIn PDF document text
- https://cdn.sqhk.co/vadetegubufo/hchdAPD/vujawu.pdfIn PDF document text
- https://cdn.sqhk.co/ramawuvade/EhhbJhc/basogebamojajatiperebe.pdfIn PDF document text
- https://cdn.sqhk.co/pimidima/bjhjjOG/32424386332.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/wupiwupiwot/where_is_fantastic_beasts_3_being_filmed.pdfIn PDF document text
- http://fijinibegomiba.rf.gd/43263741119.pdfIn PDF document text
- http://tipikirobis.rf.gd/math_symbols_name.pdfIn PDF document text
- https://s3.amazonaws.com/nefomojuwet/vet_tech_degree_programs_near_me.pdfIn PDF document text
- https://s3.amazonaws.com/bajuse/tadozup.pdfIn PDF document text
- https://s3.amazonaws.com/xenavuxa/86307925139.pdfIn PDF document text
- https://s3.amazonaws.com/nufidibodudulad/52702338709.pdfIn PDF document text
- http://rimejaje.epizy.com/beruvegatabenagulud.pdfIn PDF document text
- https://s3.amazonaws.com/dikobepibelun/entry_level_electrical_engineer_salary_texas.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ed9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED9F	3304 bytes
SHA-256: `7db4aa9dcfc42b3a6ef9a04f555e0b2fea6a31cf0b1e3bf67d3f0cf3b72bc559`
`font_01_sfnt_off0000f984.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF984	5152 bytes
SHA-256: `14a72b3e8a59ce6a36b479b8affe915321778cc1a7c66bd889071c35679ba19b`
`font_02_sfnt_off00010b1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B1A	10560 bytes
SHA-256: `c8a8b731046e4cd7be9c3fb3897155a3a73c378c2b8ffa4d9c39a84b8e0dfe6e`

Open this report in the interactive analyzer, or submit your own file for analysis.