Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df54d047ee840d8…

MALICIOUS

PDF

72.0 KB Created: 2021-05-08 13:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0ed21a04bf4f827a1a80384500914f74 SHA-1: a22b1f16673c3c63b594b6a74cec747182dc27c4 SHA-256: 5df54d047ee840d80b7066d1419052f79482919eef185492ddc2d4c4d7e8cbae
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to drive traffic or host malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, specifically phishing. The document's content, though heavily obfuscated, appears to be a lure related to using a baby carrier, which is then used to redirect to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8024

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
  • 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
  • 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://jumiwimov.ru/strik?utm_term=how+to+use+ergobaby+360+front+facing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501632/normal_5fe7ce2cc1dc2.pdfIn PDF document text
    • http://hookup154.site/1099706126332754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_60160d01f0d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5fea18ff3bd7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_604d1724e4395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492253/normal_5ffd1f0c5cd15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fc8104d89384.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/advanced_dungeons__dragons_players_handbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497078/normal_5fe4804a4f9d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485929/normal_600351f7c7d00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_6037527ca1a77.pdfIn PDF document text
    • http://dfwshootersupply.com/how_to_change_ip_using_cmd3o0zn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482854/normal_5ff961236d845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadoxosin.atwebpages.com/22256332248.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_6f73b1b4aff644239c374813883578f5.pdf?index=trueIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_ceffd75bfa4d4353af0431929e2759af.pdf?index=trueIn PDF document text
    • http://solugivewatewa.myartsonline.com/pathophysiology_of_ischaemic_stroke.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_585901061cc34bc79f8176778161a588.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_5d3ecfcc214649c1973b32d5684de11a.pdf?index=trueIn PDF document text
    • http://jowosos.myartsonline.com/capacitor_bank_connection_diagram.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 5652 bytes
SHA-256: 3f874fb2fc0b3a820da011667ce2a853817cb939f0f34e37072049b67dc4706d

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