PDF malware analysis — malicious · 3fa0096fe5874367

MALICIOUS

PDF

77.6 KB Created: 2021-03-26 07:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 06fe9b988823bdb42608378928ee9a5e SHA-1: 79e0762dc0f30a3013f73069a7463cc54732b552 SHA-256: 3fa0096fe5874367a6526b175cc4d2aa399f8d63948e007d45a4debbd86ca3ce

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution attempt. The presence of a large number of external links, including one pointing to a known malicious redirector, strongly suggests an attempt to lure users to malicious sites. No scripts were extracted, but the document structure and embedded links are indicative of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 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.
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=composiciones+del+aire In PDF document text
- https://cdn-cms.f-static.net/uploads/4408712/normal_6011b1843eb5d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366032/normal_605aaf1a0d610.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470552/normal_60462eee8b343.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392474/normal_60436f911e070.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467975/normal_601437bc2731f.pdfIn PDF document text
- http://cuzinfo.ru/what_are_the_top_social_issues_in_americadk4wx.pdfIn PDF document text
- http://sportita.fun/oneplus_nord_gadgets_360_ratingpyuk5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460723/normal_6041ee6b057c3.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/veledabejufi/yo_yo_beep_test_free.pdfIn PDF document text
- https://s3.amazonaws.com/boduxatavepe/microsoft_azure_machine_learning_studio_cheat_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/rufonali/relefowavebodawipodifap.pdfIn PDF document text
- https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_65892af0cdef46a4b5302be6253e8016.pdf?index=trueIn PDF document text
- https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_9c3c7bb721184e21aec8fa8ae5544024.pdf?index=trueIn PDF document text
- https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_85dfa939c9cd493abf61845a1d53a8b9.pdf?index=trueIn PDF document text
- https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_75035c92d9244ac5aefcee9a0e48b12e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jagux/how_to_report_dividends_from_a_c_corp.pdfIn PDF document text
- https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_af4781515b0a4cce9222f2e6fb476824.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eccf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECCF	5124 bytes
SHA-256: `628de80782ff4788b04ecd06f347a179f44d9ef0a979a8243939f5b945d7f362`
`font_01_sfnt_off0000fe1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE1A	12944 bytes
SHA-256: `2e466834452c5e73f9219d65d97de54fe60dae2d72c3b49bdb29d4351b8aa72a`

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