Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5209df3315edf7d…

MALICIOUS

PDF

72.5 KB Created: 2021-04-02 16:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 976a121973fa5e02a11f3d81c9c8d841 SHA-1: 6594d4bb1d154016a778bef755622effb2d09988 SHA-256: e5209df3315edf7daffdb783101ea50d0f5deb6d18b4b7fb5cce70fba44622e5
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically using a "home delivery pizza" theme to entice users. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=home+delivery+pizza PDF link annotation
    • https://tojumemi.weebly.com/uploads/1/3/1/3/131379390/9befddcd5a.pdfIn PDF document text
    • https://rozigakix.weebly.com/uploads/1/3/2/3/132303329/merekolirizeved.pdfIn PDF document text
    • https://devomejot.weebly.com/uploads/1/3/4/4/134491467/galiroperafifapilex.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/xemisalijigupotibevu.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/gupudanis_tomaxoru_zuzutakowas_sanuxejudiduwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sejofedavija.epizy.com/judojaxafizosulilunaxibil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243074d9-54c6-4251-80af-4dcd5bfd3d45/why_wont_my_dyson_v10_charge.pdfIn PDF document text
    • http://delifovirapa.rf.gd/komplikasi_anemia_defisiensi_besi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024931b7-f530-4e61-843e-6bc81268a1f9/mustang_960_skid_steer_repair_manual.pdfIn PDF document text
    • http://zuwipipulu.epizy.com/lubusanisunonajam.pdfIn PDF document text
    • http://lokemupuwife.rf.gd/ut_calibration_procedure.pdfIn PDF document text
    • http://nizamazibenu.rf.gd/kalifewipo.pdfIn PDF document text
    • http://dupepasanu.epizy.com/placenta_accreta_increta_percreta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e427c506-4e39-48f3-ba67-c9e8d0967884/fundamentals_of_nuclear_science_and_engineering_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1980321e-2f78-48c8-96c9-7a43235d65ba/xapulofigolivi.pdfIn PDF document text
    • http://damined.rf.gd/22853932625.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_off0000df52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 5100 bytes
SHA-256: 98d9ff302421c62367bb3f5726133be751d2d3596933353f63701100f5d2f796
font_01_sfnt_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 10828 bytes
SHA-256: 5572889311a562ff0a217fa3ee42a99a0dabda1ad81a14bbe3df6ad3db2181a3

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