Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e2537492c5d414…

MALICIOUS

PDF

73.7 KB Created: 2021-03-28 17:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ebf5e4553776b57822b102e113374cb SHA-1: c7177f88947cad5828bb20eef4f6d971b16e36d6 SHA-256: 25e2537492c5d4149e100ea380f2a26e1bda8d6d4248c321374f5c06baea3384
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/strik?utm_term=niveles+de+atencion+y+prevencion+segun+la+oms PDF link annotation
    • https://cdn.sqhk.co/dipasupor/bryNyYi/navneet_meaning_in_gujarati.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/samsung_j6200_hdmi_arc.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/eii3Lig/pipikejarewufofetuziw.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/56179662278ohy39.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hwhcOjh/basketball_stars_gamesxl.pdfIn PDF document text
    • http://okclub.org/debits_and_credits_in_accounting_cheat_sheetk399k.pdfIn PDF document text
    • http://getplafond.xyz/how_often_to_replace_dyson_air_filtercgqlv.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/5th_grade_math_final_test.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/simone_de_beauvoir_a_convidada.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/fixed_asset_management_best_practices.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/eJ8IjcB/tiny_home_builder_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Kjj7ng3/5924557234.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/hp_designjet_500_plus_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/R1TVq6f/yellow_crafter_scrips_farming.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/antonio_gramsci_livres.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/lotimoluvotudan.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/eMibdLr/flower_garden_shop_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8955225-d5b6-4aa2-afd5-764d600809f9/gelozifotimiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964c0ba6-183e-4fa4-a73b-d78f7109315e/pulovemulidesakemoravesog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfe56b9-58f4-4a09-a360-6238039d531a/tuwurosomomepozalavodo.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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5524 bytes
SHA-256: e077ff94f84e4606e7917f26f89bd16cb4c68e55dc9803bd3d3f319449f8b42d
font_01_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 10628 bytes
SHA-256: 003e79b852d26ef90dfc729385b825c1f1046ecea67145cfff6ea20b2233974e

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