Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c6f8015287d568…

MALICIOUS

PDF

72.5 KB Created: 2021-04-20 07:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b9953b4af20dfc51ef44a9a79ed53794 SHA-1: ae9d3b183622689ec8a40fd34485c211045618de SHA-256: 93c6f8015287d56862435eaec732a8f7897aa48a382abf7dcfda6fa648bf6449
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, suggests a link farm designed to redirect users to malicious content. The document body, though heavily corrupted, contains fragments that might relate to educational materials, a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://jumiwimov.ru/strik?utm_term=expressions+worksheets+6th+grade PDF link annotation
    • http://mazejofeg.mygamesonline.org/jubojojejaj.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/array_programs_in_c.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/runagugelop.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/26424302905.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/h0p0Sgi/byju_s_learning_app_free_download_for_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/vetedaxuzele/cGbhhhf/ammoniaque_formule_dveloppe.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/the_banking_concept_of_education_rhetorical_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/suzagofi/iCsMhig/vs_code_javascript_formatter_settings.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/air_bearing_design.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/what_does_sunset_mean_in_the_outsiders.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/bIigjfJ/79934861928.pdfIn PDF document text
    • https://cdn.sqhk.co/xipovowimugo/gihgrif/download_game_shogun_empire_hex_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzelewekupe.epizy.com/what_foods_to_avoid_for_low_fodmap.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/basic_civil_engineering_1st_year_book.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/ncert_maths_textbook_class_6.pdfIn PDF document text
    • http://wemopax.rf.gd/basic_hardware_and_networking_book.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_7705618c795a47e3b88f91248cec6ae7.pdf?index=trueIn PDF document text
    • http://jefebewo.epizy.com/galibululutubu.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/11511922522.pdfIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_e0952d803a2e4eb7a160e2c7efadccc6.pdf?index=trueIn PDF document text
    • http://kapowuxivi.atwebpages.com/hdfc_life_new_immediate_annuity_plan.pdfIn PDF document text
    • http://pilojoduzige.epizy.com/good_country_2_step_music.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/87142005267.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_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 5524 bytes
SHA-256: cfcaf860d0241e52ddcfdf4d59bbd7110c04c1c67cfc85f780e824819c1ea265
font_01_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 10788 bytes
SHA-256: b0b80b51b1c9ee2f11893f11b8170e840b6e9976617513df5430688990b98633

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