PDF malware analysis — malicious · fde7ea76a7950504

MALICIOUS

PDF

80.8 KB Created: 2021-03-09 23:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: b5dd27199d270deb234235d8e885d827 SHA-1: b128d640d382f32cbd5f1bada945614064e2eea3 SHA-256: fde7ea76a7950504e5d0aba234edd90d8c611f28dc5356e163f4e65d97a78fea

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a potential for malicious redirection or content delivery. The primary attack pattern observed is the creation of a link farm to distribute traffic or potentially host malicious content.

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
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.
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.
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://leonvi.ru/award?keyword=beethoven+sonata+pathetique+sheet+music+pdf PDF link annotation
- https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/5042950.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406514/normal_6027260fd1981.pdfIn PDF document text
- https://melijavunibujov.weebly.com/uploads/1/3/0/8/130873932/9c3eb4.pdfIn PDF document text
- http://jugepawe.medianewsonline.com/piwapaxana.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379987/normal_5fdbdd759a3c5.pdfIn PDF document text
- http://tublitalia.space/charcoal_chicken_nutritional_informationiakvv.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392873/normal_5fed157dd6897.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379377/normal_602f1d0aaeab8.pdfIn PDF document text
- http://pixxel.life/65442731176zapbq.pdfIn PDF document text
- https://vopenunajobip.weebly.com/uploads/1/3/2/3/132302870/81209b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485322/normal_602d3b57145bf.pdfIn PDF document text
- http://fajiriduxir.medianewsonline.com/how_to_update_s8_software.pdfIn PDF document text
- https://xuzumuja.weebly.com/uploads/1/3/1/6/131636792/a5f7b.pdfIn PDF document text
- http://amorexpo.com/hands-on_machine_learning_for_algorithmic_trading8zasp.pdfIn PDF document text
- http://urott-hu.com/roblox_fe_admin_script7ixic.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_b5075312837a42c7aacf782d54115d09.pdf?index=trueIn PDF document text
- https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_545ab3d9347a4898bfd4914764c7c555.pdf?index=trueIn PDF document text
- http://pulutugorivexek.atwebpages.com/t_shirt_sewing_pattern_free_download.pdfIn PDF document text
- http://malejubu.myartsonline.com/what_happened_at_the_end_of_the_story_the_veldt.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000da50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA50	5504 bytes
SHA-256: `1c0d77dace97f71f632de6a1da04548ff0ff3cacec1f39773b29f39f0b7c05d8`
`font_01_sfnt_off0000ecf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECF3	15632 bytes
SHA-256: `6143eb5e1eee3fa749393172697b5d572829ff12bbf00f275f65a02e280c4401`
`font_02_sfnt_off00011dd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DD6	16204 bytes
SHA-256: `541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501`

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