Malicious PDF — malware analysis report

Static analysis result for SHA-256 2207f2421f6359f2…

MALICIOUS

PDF

75.6 KB Created: 2021-02-15 00:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c9770a32d80dccf2aed287375718871f SHA-1: a34ca4c0167fa699fcc3d351a26a33406dde5fa1 SHA-256: 2207f2421f6359f237162e544908bb1475a9447e29e4e3cab5facf2cf78d0f7a
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm or phishing lure. The presence of multiple PDF_SEO_LINK_FARM heuristics further supports this, indicating the document is designed to redirect users to numerous other sites, potentially for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=componentes+del+cpu+internos PDF link annotation
    • https://cdn.sqhk.co/jumupebuvi/gjolrYA/baby_shark_lyrics_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/bPhaPK8/coloring_pages_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/7jdignP/5176739309.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/ijNopgf/dapudavoxideburisi.pdfIn PDF document text
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/8338817.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/ighibNJ/moto_x3m_spooky_land_level_19.pdfIn PDF document text
    • https://wixinuwexe.weebly.com/uploads/1/3/0/7/130739185/peladuxibi.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/N45jii7/township_game_hacks.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/jfigeCL/40438833603.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/bc872293.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/55c85887bf8b70.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/ZieIgjl/classic_car_wheel_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/bnibbyZ/votivamaxepogi.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/dxjfThb/fire_evacuation_plan_for_business.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/jbXjfcI/at_t_prepaid_customer_service_representative.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/hjisCAf/78478732018.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/ijygdrS/slick_slime_sam_sue_pregnant.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/QFicgjM/darwin_s_yearbook_game_online.pdfIn PDF document text
    • https://gulapekojikag.weebly.com/uploads/1/3/2/7/132741551/tasepetopekogujeguj.pdfIn PDF document text
    • http://zavifuvalo.22web.org/knight_rider_piano_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafaxeko.epizy.com/classical_sociological_theory_craig_calhoun.pdfIn PDF document text
    • http://vudalulok.rf.gd/wawopodedowututum.pdfIn PDF document text
    • http://vebujameja.rf.gd/topogopotowuro.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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 4916 bytes
SHA-256: d51ba307e148a0ed5a99363856d62646ae05cc4646f723523c9fbb3dd1d3074f
font_01_sfnt_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 11088 bytes
SHA-256: e3da25fe70ce2e5b61262a83939f1082fd390ca3e6518528dc3d9b707c344c8c