Malicious PDF — malware analysis report

Static analysis result for SHA-256 623ee58529bd3c26…

MALICIOUS

PDF

80.5 KB Created: 2021-03-10 04:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 82b3e364d20d1e44dd0c2dcce665a5a4 SHA-1: d28727eee467d702eed225d8f719f11071c59115 SHA-256: 623ee58529bd3c266c94fd42a48077c44b4b02f67f11d23454ba5891ca0a4085
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing or malware delivery technique.

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://lozipotod.ru/wix?keyword=pittsburgh+area+concert+venues PDF link annotation
    • http://zdorovienashevse.xyz/creditors_ageing_report_in_excel182pj.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/iMifqjd/likavunojewuti.pdfIn PDF document text
    • http://afracheat9.xyz/who_compiled_the_books_of_the_old_and_new_testaments1xw21.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/penewokagagaxizevigedaz.pdfIn PDF document text
    • http://gokutep.22web.org/87601743588.pdfIn PDF document text
    • http://basofeveku.iblogger.org/90222480195.pdfIn PDF document text
    • http://axecheat8.xyz/96726271964ufbz8.pdfIn PDF document text
    • http://bapozuwemixad.22web.org/bodiwogu.pdfIn PDF document text
    • http://moreprodukti.com/how_to_wash_graco_pack_n_play_napper4hbd6.pdfIn PDF document text
    • http://skywonder.space/41005611970dz7k0.pdfIn PDF document text
    • http://vewugaludosa.22web.org/fapowiferitakobufo.pdfIn PDF document text
    • http://manthoughtswebsite.website/luregivotakimedowigavuseeisp.pdfIn PDF document text
    • https://cdn.sqhk.co/dokadajij/jipjdgg/monkey_mania_albuquerque.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/zefatokum.pdfIn PDF document text
    • http://hookup157.site/como_agua_para_chocolate_que_significas534k.pdfIn PDF document text
    • http://batut.space/fezawixajisawedusuk55oy.pdfIn PDF document text
    • http://copyrightproblem.com/wekulivuveririzivve2py.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/71763547533.pdfIn PDF document text
    • http://xefukogan.rf.gd/71288440109.pdfIn PDF document text
    • http://pogapebod.rf.gd/dragon_age_origins_walkthrough_sloth_demon_fade.pdfIn PDF document text
    • http://xofigawarogipiw.rf.gd/tuloja.pdfIn PDF document text
    • http://lefumes.rf.gd/onboarding_checklist_template_australia.pdfIn PDF document text
    • http://zesakek.epizy.com/how_to_draw_nature_scenery_step_by_step_easy.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_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 5232 bytes
SHA-256: da2f725b285fcf5b1a70c42e8c8e8be9fc3684ad8c62e37eff37a493181e78d2
font_01_sfnt_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 10400 bytes
SHA-256: 0bc7743ffa65c786b3f775507453af3715be8a14defb6817b7d38f6026b060ad

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