Malicious PDF — malware analysis report

Static analysis result for SHA-256 364967a0ddf324fc…

MALICIOUS

PDF

75.1 KB Created: 2021-03-23 20:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2be5ba646a95b5ff9e5603e3168dc960 SHA-1: 2952456f4a7b13a6ebe38dbf57a0fe43fee0a53b SHA-256: 364967a0ddf324fc01ad05601dec2ddf2d4ee8e7cdf0459e4bebc86a07053b9f
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be a phishing lure disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=what+are+examples+of+auditory+phonetics
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5ff9469a0246c.pdf
    • https://cdn-cms.f-static.net/uploads/4391599/normal_603ad27716582.pdf
    • https://static.s123-cdn-static.com/uploads/4453914/normal_5fe2ebb92f513.pdf
    • https://cdn.sqhk.co/numisezopo/hjTqJii/oh_baby_aakasam_lona.pdf
    • https://cdn-cms.f-static.net/uploads/4391907/normal_602379ffa425c.pdf
    • https://cdn.sqhk.co/bemaxopig/jchfhdx/soccer_goalkeeper_training_drills.pdf
    • https://cdn-cms.f-static.net/uploads/4453732/normal_5fea3a8ada497.pdf
    • https://cdn.sqhk.co/limizolaxa/haghS2h/beautiful_wallpaper_for_desktop_background_hd.pdf
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/rudugepiz_duzoxis.pdf
    • https://wopusuxosar.weebly.com/uploads/1/3/4/5/134583764/eebc899af79495e.pdf
    • https://cdn-cms.f-static.net/uploads/4425916/normal_601fd1a04c224.pdf
    • https://static.s123-cdn-static.com/uploads/4466680/normal_5fe5520418d10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_4eabb91b5c204ed498169904f8261097.pdf?index=true
    • http://momesesewoja.rf.gd/how_much_is_a_bowflex_blaze.pdf
    • http://jepatejefa.epizy.com/winforms_checked_combobox.pdf
    • http://ratesedefavure.epizy.com/centro_escolar_university_makati_application_form.pdf
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_18db28aa7a544685a95d79132f530882.pdf?index=true
    • http://repikigerudu.rf.gd/datacion_con_carbono_14.pdf
    • http://juzavinozil.epizy.com/tudaduzijadojovavason.pdf
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_a31eacf970244e249b86d52b254474ce.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e891.bin
ad5bf899b21f531d316f97f07cbe09e468ffb256f2e22146e5b3f13ab53f661c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 5580 bytes
font_01_sfnt_off0000fb77.bin
76383b6d749b5b76f92af137d6e0bc03e75f7ca13cecd4c927ed801dc96cec52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 10340 bytes

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