Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abd44591832a679…

MALICIOUS

PDF

86.6 KB Created: 2021-03-16 06:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 28d8a96e64c22b090ee6c66d8fafbdef SHA-1: 40786857de2815c047566413735a5577e0030f12 SHA-256: 4abd44591832a6790e1c1d005dee816d15fcebf7684240f870121dd975de4da8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a high number of embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming attempt. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=nikon+coolscan+v+ed+film+scanner+review PDF link annotation
    • http://hookup154.online/is_anker_a_good_brand_for_earbudsmyv1m.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/36611071028.pdfIn PDF document text
    • http://bnatural.space/jabajorigakutologu35631.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/what_does_the_suffix_gress_mean.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/54207355898gbfqd.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/how_to_connect_hp_airprint_to_iphone.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/jobasidifan.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/mawewopovepen.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/cirrus_sr22_illustrated_parts_manual.pdfIn PDF document text
    • http://totipuzuforaz.mywebcommunity.org/golubekaw.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/proceso_de_investigacin_de_mercados_tursticos.pdfIn PDF document text
    • http://verifybadgehelp.com/kafaruwujafadel8rpaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluxewamotate.atwebpages.com/can_you_keep_a_secret_release_date_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/udemy_free_for_pc.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/95002973572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f8c215-166c-4a5c-b589-2fdfe81bf81c/samsung_galaxy_a10e_unlocked_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3349a5b5-f79f-48ae-967b-f777d7a8f7c4/sword_art_online_novelupdates.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/how_to_draw_lips_in_procreate.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/11854098893.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/roduxarebuxazar.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/chapter_tension_pole_shower_caddy_instructions.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_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 5352 bytes
SHA-256: 1eac1552d0ae6cbc8996ebbcc0e41739cc5bae26f0e999d5ba0158e2c3cef5de
font_01_sfnt_off000124a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A2 11956 bytes
SHA-256: 6fb509dc04e88a3190ccd04c681609dc731b08f49364ef44f3d8773fc4e29766

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