Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76822e3a0257768…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 13:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 372e7b686f038cb8555f88cf008c1d5f SHA-1: ccd4d96d16b7d4feee7a7418f578bee08ca1ee66 SHA-256: b76822e3a02577684704c592732c8928da7d41ad5fe2a33588d3c8552a3d2b46
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=accounting+business+management+pdf PDF link annotation
    • http://kofupum.mygamesonline.org/hotpoint_gas_oven_broiler_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/wetewajaba/ORifjfr/2336414594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fcc8ee91901c.pdfIn PDF document text
    • http://7gusevshop.website/the_babysitters_club_the_truth_about_stacey_graphic_novelhs3ag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_600c8e2b05177.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/jjrHjce/century_21_nyc_broadway.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/tim_weiner_legacy_of_ashes_review.pdfIn PDF document text
    • http://pl50off.info/salat_al_istikharazpz7d.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/oihLidZ/rounded_corners_indesign_2019.pdfIn PDF document text
    • http://kunozoxutokusu.mygamesonline.org/bolens_13am762f765_manual.pdfIn PDF document text
    • http://begedotupatato.66ghz.com/hospitality_management_accounting_9th_edition_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_60297f71a411e.pdfIn PDF document text
    • http://rolevuses.iblogger.org/ccna_cyber_ops_lab_manual.pdfIn PDF document text
    • http://strongcreditscore.info/ponniyin_selvan_mani_ratnam_castingnme7k.pdfIn PDF document text
    • http://getbuiss.online/gowojitt5uv5.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/qkhficu/31887428024.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/Kigg5ov/93364553837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427287/normal_5ff04a2303908.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/pulavokaxe/can_you_play_pandemic_by_yourself.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/tavutozisefab.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/26252929055.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/ambalamillathe_altharayil_vazhum_song_free.pdfIn PDF document text
    • http://nejexapef.rf.gd/math_word_problems_9th_grade_with_answers.pdfIn PDF document text
    • http://junulanomelab.rf.gd/soluciones_isotonicas_e_hipertonicas.pdfIn PDF document text
    • http://tedonipevafipe.epizy.com/harry_potter_books_series_list.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5476 bytes
SHA-256: c2060074eae5e5d0e0652de1651138411ddb4cc42556166ca001fcab3c3e2ab8
font_01_sfnt_off0000fe15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE15 10548 bytes
SHA-256: 6edcd9b767d4683b12259dd46dbfabe0c11c158a0053c94d515dd8f9c784f9cb

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