Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71514ae0ec193a2…

MALICIOUS

PDF

93.1 KB Created: 2021-03-12 00:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 575830c87d7f8a1d98377133f53b0e19 SHA-1: db2de0a63af92405c088e3cf69be8e369d041af7 SHA-256: e71514ae0ec193a2ad6d664449a7231dc598074fbcc710f5637a11b7b82b681d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing lure. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this, pointing towards a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/123?utm_term=austar+tv+guide+qld PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474446/normal_5fee6d507ba1d.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/what_is_the_best_sodastream_model.pdfIn PDF document text
    • http://catsism.com/dissidia_duodecim_labyrinth_guidespr00.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/jiwupugotasogowubep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530712/normal_60230ad8e621e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485809/normal_5fd787b4da370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_60113be6a9745.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/how_to_draw_manga_girl_poses.pdfIn PDF document text
    • http://dusipoweg.mywebcommunity.org/health_and_physical_education_class_9.pdfIn PDF document text
    • http://voirly.xyz/20889664309do2r0.pdfIn PDF document text
    • http://delinapod.mypressonline.com/1133737166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_600997f9032d5.pdfIn PDF document text
    • http://usacarins.com/5x5_workout_plan_bodybuildingpuho6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_60450a952d673.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/map_of_europe_1939.pdfIn PDF document text
    • http://snapchat-alert.com/90257816854i3zfe.pdfIn PDF document text
    • http://damita.fun/high_school_geometry_worksheetsnfo4r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391925/normal_5ff225962d514.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/how_do_you_setup_a_saltwater_tank_for_beginners.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/fuzipagaloremebuz.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/innova_3160g_bluetooth_pin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_60295658adafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevusup.atwebpages.com/how_to_start_cyber_security_career.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_off00012b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B80 5168 bytes
SHA-256: 49d9662b2ceae35dcd1777f2e7305e5b378119cf86ef51580e7bb73c6488ea39
font_01_sfnt_off00013d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D23 13276 bytes
SHA-256: d3957b4165c4e7adafed2cb98a7fc8240f27f383dde7dea3980be21f5410a4e1

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