Malicious PDF — malware analysis report

Static analysis result for SHA-256 0753b532800402c4…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 01:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96edfc033d061080e77102210d077ba2 SHA-1: 581be2ed0442f680dbf4a92f48cb59a249b268db SHA-256: 0753b532800402c4872587a9cfff7e7780fd6f034d8d3a3b6923d9e48eafc870
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9182

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+to+activate+nordictrack PDF link annotation
    • http://copyright-central-media.com/roblox_s1_filingmuww3.pdfIn PDF document text
    • http://wssummer.space/word_chef_financier_answersck1pl.pdfIn PDF document text
    • http://subonus.ru/serato_dj_pro_updateqa2zd.pdfIn PDF document text
    • http://futup.ru/jamey_aebersold_mp3sylzs.pdfIn PDF document text
    • http://axacheat4.xyz/bewexufutebepojitomcqg5v.pdfIn PDF document text
    • http://fapseo.ru/79075691505ieiw4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_60453a07aec70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_604043b85b7fc.pdfIn PDF document text
    • http://submonster.xyz/electrolux_singapore_washing_machine_repairhmu7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_604b4c5083b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500897/normal_603b36f212c40.pdfIn PDF document text
    • http://odemebayisitrafik.com/what_is_psychological_testingokp0l.pdfIn PDF document text
    • http://meetsalon.xyz/307816333605zgmf.pdfIn PDF document text
    • http://frontglass.xyz/zeporurl0e1w.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/rizezobabub/ethernet_cat_5e_datasheet.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_84888509fc944717a70c3f463d1bd98a.pdf?index=trueIn PDF document text
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_f7452f6b03d54935af791a0a316f6ca0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipizaju/39801309842.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_9ec967378a2e4243978fa60839d26eb9.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_57c14bfe4894416e8e2320d6de57845f.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 4900 bytes
SHA-256: 735f400716e66915bf4ad128e15df0fccc0a05fb68ec5f93bb3bf9edeb6a5158
font_01_sfnt_off0000fd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 10932 bytes
SHA-256: 549a363f16235e1f05cbb8e65105bf78d8235aca1cf57d08e7feee40ec251b9c

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