Malicious PDF — malware analysis report

Static analysis result for SHA-256 4900c468c98fcbef…

MALICIOUS

PDF

68.3 KB Created: 2021-02-12 17:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 75949558cef77fd77116206c7bbab916 SHA-1: 2ead354669a869ab311dc95dd6049b34c1dc5310 SHA-256: 4900c468c98fcbef2f483ae45096b51d735f0557887ad1e5ff64d7d8d610613c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=sequencing+events+worksheets+for+grade+7+pdf In PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/17c0841.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/dfkCjd9/my_talking_angela_games_play_online.pdfIn PDF document text
    • https://fatuzolawodazu.weebly.com/uploads/1/3/4/7/134730183/nozafatudoz_likaxusonuvet_rakowajovi_tojowav.pdfIn PDF document text
    • http://fitokapss.xyz/bud_not_buddy_downloaddp33i.pdfIn PDF document text
    • http://ejinaya.com/58078516597fcef5.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/9895f.pdfIn PDF document text
    • https://selemuja.weebly.com/uploads/1/3/4/8/134893326/varovuguz.pdfIn PDF document text
    • http://damodudajipofem.22web.org/71216901303.pdfIn PDF document text
    • https://cdn.sqhk.co/kixalixu/PUifzhh/fireboy_and_watergirl_forest_temple_walkthrough_all_levels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375909/normal_5fced7928ab4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_601b0160e3fcc.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/bid2HX7/26079420563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_6015ae284dd6b.pdfIn PDF document text
    • http://paxibokojusaduw.22web.org/barneys_farm_triple_cheese_smoke_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nonogopikizezed.rf.gd/pasipekijejedagisapi.pdfIn PDF document text
    • http://nosunep.epizy.com/22822666198.pdfIn PDF document text
    • http://nogomazarem.epizy.com/full_form_of_bams_in_medical_science.pdfIn PDF document text
    • http://zimeketoxera.epizy.com/dungeon_builder_s_guidebook.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_off0000ccb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB7 5912 bytes
SHA-256: 631b0baf4826304746b659e06e7e6f0f14aec44b9d5f03a624034830a6a28b79
font_01_sfnt_off0000e0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EB 10324 bytes
SHA-256: 08ffc68a29b8616ec9963a58117c36b886a6626fb5702bc10ad7ea86639c87bb

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