Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17c5a3e62f7fbb4…

MALICIOUS

PDF

84.6 KB Created: 2021-03-29 17:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1dd9a644fd188767822eac3591bf562f SHA-1: ee51e8524fd6f9d4c68114da5092a9ecc7ca5f57 SHA-256: e17c5a3e62f7fbb4ac94757f6c47f5bf0b96b6dbc2cd51bd644998b08d2d7db8
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Samsung galaxy s4 mini technische daten'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=samsung+galaxy+s4+mini+technische+daten PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601b48eb4f5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_603ec0ecd3c55.pdfIn PDF document text
    • http://znohist.site/28189227796bxxoe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_600c40a72b6ab.pdfIn PDF document text
    • http://tezatigobupuvu.22web.org/lurupegepuravav.pdfIn PDF document text
    • http://zajilakofudo.scienceontheweb.net/moparutevaguj.pdfIn PDF document text
    • http://edayafar.xyz/31904174502mw6zm.pdfIn PDF document text
    • http://nout-sale.site/mezafifezijurevonamaniz4z69t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_605c6afbb9849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_605d74aea26dd.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/gawidasibigesixopaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_6057f7bfab579.pdfIn PDF document text
    • http://ndfnasg.xyz/creating_web_services_in_asp.netdmdq9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376629/normal_5ff69ea8eeac2.pdfIn PDF document text
    • http://gratoramaa.website/fugakekejuwalozudomapogiq5fgh.pdfIn PDF document text
    • http://datinge.site/how_much_does_monat_pay_you36rir.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/steps_to_personal_revival_sda.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/70177873158.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/thyristor_firing_circuit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepuvebawufik.epizy.com/vugegukurokimevofed.pdfIn PDF document text
    • http://lebozid.epizy.com/29348622819.pdfIn PDF document text
    • http://vexorulutukozov.rf.gd/how_many_hours_nhs_annual_leave.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_off00010bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCD 5616 bytes
SHA-256: 5e5572fd3d7e7a8b8ffa49bd661d08cc268e5419f0a72173ca7e6c0ce60bc6b3
font_01_sfnt_off00011ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED6 11076 bytes
SHA-256: 9a04643cf029fb4f39287ede011f7efab669c6254d1418855202d793cabc56bd

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