Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1fa269e6ce5516…

MALICIOUS

PDF

69.9 KB Created: 2021-03-02 16:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c806fea646b792c04553888637cd7f0e SHA-1: 244922eca4f6308e9251e9622fe9f054f9a472e8 SHA-256: fc1fa269e6ce55164ca815b5f2871b3a21ed0cf8f315eab844ed7d1ae9428472
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous external URIs pointing to a link farm hosted on disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=el+mesias+ricardo+arjona PDF link annotation
    • https://cdn.sqhk.co/rebiguta/gcgiaCl/zozijefuwidafovawixepaxik.pdfIn PDF document text
    • https://cdn.sqhk.co/pujunuzivas/RDukbfW/43082857315.pdfIn PDF document text
    • http://xakugitanaz.iblogger.org/kaypacha_pele_report_july_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/2jfhitr/882067782.pdfIn PDF document text
    • http://dewobazul.22web.org/animedroid_s2_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/iQyoZgj/40405251609.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/dokugitanadita.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/kcYjMjh/76578552527.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/25921722791.pdfIn PDF document text
    • http://xiwasaruv.66ghz.com/cambridge_advanced_expert.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/hahehjH/supezutivanusozufoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/jjgXjj4/microsoft_azure_fundamentals_certification_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/j7gfMHg/mikokive.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/Lhcjhv6/piano_chords_chart.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/67570338116.pdfIn PDF document text
    • https://cdn.sqhk.co/zimevegi/sQVjhif/23282362000.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/hgLQ7jj/roblox_studio_module_scripts.pdfIn PDF document text
    • https://cdn.sqhk.co/fiziroluj/g0jdPhi/best_lock_screen_password_android_wallpaper.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/panda_express_allergen_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/geOjdhe/kadurupujofivig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexepetilak.rf.gd/trig_identities_double_angle_worksheet.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_off0000d7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F6 5120 bytes
SHA-256: 17fa2c3287045905935285815d9f6a129a58f53c264e3e5383acfdd32de9e9fe
font_01_sfnt_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 9840 bytes
SHA-256: c0fc20073b25ec4e901d19727ddbfdc064d52d8d5831598c23882abe43ad3772

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