PDF malware analysis — malicious · 2164e1d7b26e234c

MALICIOUS

PDF

77.0 KB Created: 2021-02-26 00:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: d436c1238a6f08c66536d700c8bea01c SHA-1: 382e73792ec42f14b889042c7f344cfcdc24d799 SHA-256: 2164e1d7b26e234c4ae7419d428f414897b45e96fe9db52c983d18f53e6d2795

224 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and redirectors, indicating a phishing or scam attempt. Heuristics like 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SUSPICIOUS_LINK_LURE' strongly suggest malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's designed to lead users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE

PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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://yafferge.ru/wix?keyword=what+is+descriptive+phrase+mean In PDF document text
- http://podcard2020.site/keneruxaropozatewolopugr98dw.pdfIn PDF document text
- http://startask.ru/airpods_2_user_manualtasn0.pdfIn PDF document text
- http://idealica-ufficiale.site/how_to_use_adobe_writert97xx.pdfIn PDF document text
- http://lebepufu.mypressonline.com/79212984967.pdfIn PDF document text
- https://cdn.sqhk.co/menasimax/ijijjic/unicorn_runner_3d_mod_apk.pdfIn PDF document text
- http://trixy-matrix.space/gomtrie_des_molcules_1ere_s_exerc6jze2.pdfIn PDF document text
- http://reabook.online/tarot_reading_books_free_download5vxrg.pdfIn PDF document text
- https://cdn.sqhk.co/sumefixes/jgggdgg/91910864924.pdfIn PDF document text
- http://loginwithfb.site/84194819029y1j3r.pdfIn PDF document text
- http://aslixan.com/moxamagaxovuzikaragelane1smsb.pdfIn PDF document text
- http://dorightschool.com/join_clash_3d_gameedzkx.pdfIn PDF document text
- http://rcasino.info/norulupivagufarulikm0m1.pdfIn PDF document text
- https://cdn.sqhk.co/bubiwalifeda/amwjfQc/space_commander_war_and_trade_guide.pdfIn PDF document text
- http://trenketo.buzz/wukidotidikenezogesokumeaokoo.pdfIn PDF document text
- http://omerkatanalp.com/1995999798cqbt2.pdfIn PDF document text
- http://front-glass.space/anglo_saxon_literature_characteristicsdeogw.pdfIn PDF document text
- http://haustova.com/area_and_perimeter_anchor_chartuopc9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/donake/axillary_block_usg_guided.pdfIn PDF document text
- https://s3.amazonaws.com/nagudo/72413435142.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_off0000e59f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE59F	5032 bytes
SHA-256: `f78c8590b2e22ff92f6f39cbac7ece551d24e11df696b05001d871776a4a5224`
`font_01_sfnt_off0000f692.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF692	10016 bytes
SHA-256: `ad3f1dd97fe42a9b5369b5ba8c2d83abe4cc4bdae4100bed267db1d638b929d8`
`font_02_sfnt_off000118cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118CB	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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