Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0430bd4158b0451…

MALICIOUS

PDF

78.0 KB Created: 2021-05-03 03:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09bfdae6bf2f9d92776e88a176c9c9dc SHA-1: 53918d0949fddd137a0a251652a61650e1858ca6 SHA-256: a0430bd4158b045125dd5480d6de68fac84fc81e36420f751d6c4ec8e904f21f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • 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
  • 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://kuzutuzo.ru/strik?utm_term=dewalt+3000+psi+pressure+washer+manual PDF link annotation
    • http://fenellalucynelle.info/29636165595sfpcn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_6026fd46ab0cb.pdfIn PDF document text
    • http://abzac.me/51230296595zx8tj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_6051dfeb32bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462037/normal_6030174be991f.pdfIn PDF document text
    • http://madusotiju.22web.org/xozalisetoserakivol.pdfIn PDF document text
    • http://vibawukukar.iblogger.org/chronic_stable_angina_guideline.pdfIn PDF document text
    • http://fastgetme.online/lawev1ekib.pdfIn PDF document text
    • http://cybety.xyz/dakirerupenfs6s1.pdfIn PDF document text
    • http://bnatural.space/foxoreforejb9mqz.pdfIn PDF document text
    • http://xiwikene.iblogger.org/chase_mortgage_assistance_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5feb0a22a51a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_5fd6631e98e46.pdfIn PDF document text
    • http://ukrdomonis.xyz/dell_t5500_ram_voltage0l8fl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_6e8409be10ec4fafa5f097d8274c6338.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_a5a306cefb004356b13fd9607bb2a665.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/sazizox.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/half_past_and_quarter_past_worksheet.pdfIn PDF document text
    • http://xodenumaverap.epizy.com/4838977665.pdfIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_b7225832fd584e81a12b8c6c8670e0cc.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_07a873da1cf548fa9a949ebbef00c911.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/14923085459.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 5456 bytes
SHA-256: 98f1597255cd0ee2c15b56986f6c4844b18dc6affdeb947b88c5f1c2f3bd61ad
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 10852 bytes
SHA-256: 906433ae6ce9f3595ef4039f867b7629b0584b359d27094048d6ff0c96abf1c5

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