Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ea9e98fa6f4565…

MALICIOUS

PDF

94.1 KB Created: 2021-05-01 03:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ed2bdb015884741da64478931ae95c72 SHA-1: 2ca7a7192a61a701c29e2bcdbb66268571e6ec1c SHA-256: 64ea9e98fa6f4565143a3ac1f6d9b71e766193b778c25395826d2af9ca753867
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the nature of the heuristics indicate an attempt to redirect the user to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xezojetit.ru/strik?utm_term=untimely+meditations+summary PDF link annotation
    • https://terimigekebala.weebly.com/uploads/1/3/0/7/130738799/34fc512c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fdc7ffc00be3.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/jcsgg6D/now_watch_me_whip_and_nae_nae_lyrics.pdfIn PDF document text
    • http://kodutizaga.mywebcommunity.org/11591399246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470535/normal_6007ae9fca628.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/IjgYhhq/hat_tricks_sports_bar_and_grill_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_60093483ae0ff.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/waiting_for_godot_analysis.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/33f8f0.pdfIn PDF document text
    • http://vifijes.22web.org/30279589227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392666/normal_6003258a953c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zulalef.rf.gd/zawulanima.pdfIn PDF document text
    • http://bogurivesinoni.rf.gd/54903382171.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_689a2e13bf7f4930a396b71e3949f47b.pdf?index=trueIn PDF document text
    • http://jeximojela.myartsonline.com/catalogo_de_bujias_ngk_mexico_2020.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/gojulexen.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_6db5a7bdcdc84d6890c435f86d20628d.pdf?index=trueIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/49476092126.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_off00012f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6D 5064 bytes
SHA-256: 77c2ee33e82364b9a7b0c0cd8acc3f479ed91cc78d29e9e9af93b7d57aab210c
font_01_sfnt_off00014093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14093 12324 bytes
SHA-256: 10cccf1219e518e35e660f616a1a58add9ea49ec733eff622efe3dc46dd9e9c6

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