PDF malware analysis — malicious · 4e2e7e5c3ead2444

MALICIOUS

PDF

108.8 KB Created: 2021-03-17 01:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 52d93108e7028252979be8be16e43eef SHA-1: 33a36f2c3daabb1e720d2dd06d47835b36b49062 SHA-256: 4e2e7e5c3ead2444ae4213c4aac6368180290ab4f27b40cdcf0b4a2fb4aa7d78

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=necesidades+sociales+del+ser+humano PDF link annotation
- https://static.s123-cdn-static.com/uploads/4460247/normal_5fe23da457e39.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408348/normal_6030248f8c16e.pdfIn PDF document text
- https://sawebegiwe.weebly.com/uploads/1/3/4/7/134706463/380b1b45.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420915/normal_60512fc8bfb6c.pdfIn PDF document text
- https://titanukudolilip.weebly.com/uploads/1/3/6/0/136082060/pimomevukosel-dusudogu-xepadevu-kekuzajup.pdfIn PDF document text
- http://genoray.pro/programar_control_de_directvcak9g.pdfIn PDF document text
- https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/6172328.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4483864/normal_5ffa86934691a.pdfIn PDF document text
- https://zelosadu.weebly.com/uploads/1/3/1/3/131379518/6952218.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426073/normal_5fd09e998142e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375504/normal_5fda5ffaeac34.pdfIn PDF document text
- https://tatosemivuzufik.weebly.com/uploads/1/3/4/5/134599987/vukokuw_tapivaxexamode.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424361/normal_603911d9b488a.pdfIn PDF document text
- https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/8f0f94592.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428341/normal_6048e63feb9e7.pdfIn PDF document text
- http://com-servers.online/kekizubofakowarujokersn08.pdfIn PDF document text
- https://datakazikuvosu.weebly.com/uploads/1/3/4/3/134353567/f88952d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458389/normal_5fe8d8eb75a15.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500887/normal_6029b62b85130.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413462/normal_60226aee15152.pdfIn PDF document text
- https://numanufideju.weebly.com/uploads/1/3/4/6/134615348/7f565d9d3b56531.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
- 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_off00015fab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15FAB	4952 bytes
SHA-256: `d17aea3e07c875d784aaa4922b40647b531885c5b08d802df17731a755316d0d`
`font_01_sfnt_off00017040.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17040	11508 bytes
SHA-256: `fdc047170e3374a6bc26bbf9c5fe895e605b89734aa3e01561434a290122eb26`
`font_02_sfnt_off00019747.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19747	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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