Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd52f580451dd9cd…

MALICIOUS

PDF

71.1 KB Created: 2021-02-19 11:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 88e7328c74f5bc61e82a1c3403d3ebcc SHA-1: dd0ec9d03040da47c2c786962327ead48d3e1cd6 SHA-256: dd52f580451dd9cd9898f2b28dfdb8ae143ad0f117d88a5e0dab9c525614dd75
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=combination+and+permutation+worksheet PDF link annotation
    • https://pijaremurepapo.weebly.com/uploads/1/3/1/4/131406688/kudedavimujasu-nakupinides-nagapojozenune-sarepep.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/fgfs69H/the_alchemist_code_nero.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/fHhj9je/58033352166.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/zoeihib/top_10_list_maker_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/h9ghgrY/communism_vs_capitalism_vs_socialism.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fcecc7f7e930.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/hcjgjed/gasofunikumodujuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_6006414c85b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_60126a05ed47f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_600deecb01b9f.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/2426973.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jaloto/activits_pour_apprendre_le_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/freelancer_mod_manager_1._4.pdfIn PDF document text
    • http://kegogoxuxupi.rf.gd/avent_breast_pump_manual_boots.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/96080521364.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/47814351634.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/2845203040.pdfIn PDF document text
    • http://vevemaj.rf.gd/care_bears_theme_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/pacman_flash_free.pdfIn PDF document text
    • http://kudawarov.epizy.com/video_converter_to_avi_software_free.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_off0000da76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA76 5368 bytes
SHA-256: ac811f4bf6071909f24838f9f3dfedd2cae44fae49dd2e5f70c2fa095ec318f5
font_01_sfnt_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 10328 bytes
SHA-256: f725030717963d7e69a61e405f87caa4886c3b4921001af02d169af8308601e8

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