Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a48c5195616ee26…

MALICIOUS

PDF

76.6 KB Created: 2021-03-07 20:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 957cd5bede7594838c7267f3a132f289 SHA-1: aade8e3b9f234eb7840664027e5ba3044497d328 SHA-256: 8a48c5195616ee26f9d96a4f97f9c073263f21ccac32a326c4b118b5d084cce2
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, suggesting a phishing or malware distribution attempt. Heuristics indicate the PDF is part of a link farm on disposable hosting, further supporting malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=ultimate+nintendo+guide+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419236/normal_6012962142f06.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/2csVvI1/1368734084.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/how_to_align_celestron_nexstar_evolution_9.25.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/definicion_de_contabilidad_de_costos_por_autores.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/tozofogodobalilonujufubo.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/vejujuvakofofupelu.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/chfjbie/11875130704.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/ZiinidJ/budiko.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/julipifenudofawekej.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/boye_long_loom_set_instructions.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/tamobozerexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_6015b5e71896f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_60020d0e10f2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fffe7408a9af.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/be228729-3af1-4788-b383-54241f32e940/what_does_woe_mean_in_keto.pdfIn PDF document text
    • http://bopebewi.epizy.com/how_to_use_dmt_diamond_sharpening_stone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71495dc2-9998-4986-8d01-045b09567c9e/how_do_i_get_netflix_on_my_dish_hopper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd3b573-c41e-4fe0-9ce4-2c4d12339fc1/19190504063.pdfIn PDF document text
    • http://noxifepa.rf.gd/kubaninada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff15e4d4-1ba8-4ee1-8a87-b5986a82b47f/hoover_windtunnel_3_max_performance_pet_bagless_upright_vacuum_cleaner.pdfIn PDF document text
    • http://ruxiwegomepolu.epizy.com/why_is_my_bosch_dishwasher_leaking_from_the_bottom.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_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 5064 bytes
SHA-256: 77e8afe8040160b96045242592fc0ed0610938ae96b0fba8e4f0c5fd6d6904bd
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10472 bytes
SHA-256: 84a5910e130b3b03f81b533d14f4a30df51bdba09ecf1c49f39faade604e387a

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