Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c38aa509675912…

MALICIOUS

PDF

82.6 KB Created: 2021-04-18 12:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6169ed4fc08c67691344c0c7a4142d80 SHA-1: d2e5dff2ad4a319e2523d011dae1a6bdfd157360 SHA-256: 61c38aa509675912b215f84524fee95b670ca8c48b89bf066965d159d285349a
126 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. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'link farm' heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=is+6+sigma+worth+it PDF link annotation
    • http://rameautbxy.space/avaya_partner_acs_509_processor4c596.pdfIn PDF document text
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/nafokuwovemurafugu.pdfIn PDF document text
    • http://summer-italy.fun/27082063809q9q7s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_605b4383110fc.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/luzuke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5fcc6b8d8d4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_6057fc970331c.pdfIn PDF document text
    • http://habercigo.com/kaxoxedelemilepevan74oz.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/nofobemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fccd7c959868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_5fe82ada8a6e8.pdfIn PDF document text
    • http://medyayazilimtr.com/95461982510xns1.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/kogisunigad_dewafeno_moditajo.pdfIn PDF document text
    • http://alcexpress3.xyz/what_are_the_most_popular_dinnersqjrxp.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/nox_player_android_emulator_windows_7.pdfIn PDF document text
    • https://xekitagib.weebly.com/uploads/1/3/4/6/134668592/wemufasopawubiz_wobesimijes_pulaziximem_nojuzes.pdfIn PDF document text
    • https://bubinaxe.weebly.com/uploads/1/3/2/6/132681619/d80d4e1b.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/dezajok/2073122297.pdfIn PDF document text
    • http://xofiketur.rf.gd/romapawabamerinabevamuja.pdfIn PDF document text
    • http://zulorokufejepa.rf.gd/mycoplasma_bovis.pdfIn PDF document text
    • http://pibusobi.epizy.com/sorcerer_saving_throws.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/39054203878.pdfIn PDF document text
    • http://wugupur.epizy.com/physics_practical_experiments.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/dental_infection_antibiotic_guidelines_penicillin_allergy.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/baretugoweruxufubime.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 5252 bytes
SHA-256: ab3650295e7bb2bfb0baa47187a26d07c8b30f74a7f48cd3016ccb4723ad9a39
font_01_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 10468 bytes
SHA-256: 3472dd867d7033a5ecdf23695efc67bb4985e12c74316c940971e9216599e688
font_02_sfnt_off0001277e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277E 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140