Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0120816aa32207f…

MALICIOUS

PDF

70.7 KB Created: 2021-02-23 08:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0b6e9e38c4953013c6823bc9e9ebe8a8 SHA-1: 19df9fed336207ffb4c82ff7e6e7c35c0173c068 SHA-256: e0120816aa32207f4dd016d1b18d72eccedc44981b9879dcad88cc462b74f215
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=umbrella+academy+comic+pdf+descargar PDF link annotation
    • https://cdn.sqhk.co/gevajoke/ZFCLF9T/my_metro_payment_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/b4igiik/guess_the_song_music_quiz_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/rEgghad/exorcist_definition_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/gduJ8jf/79679437690.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/iiEjgew/jejofuru.pdfIn PDF document text
    • http://andyhongdigital.com/bidabobouup31.pdfIn PDF document text
    • http://jakartapro.xyz/uyire_songs_free_mp3_downloadlncpg.pdfIn PDF document text
    • http://pisodanijuke.iblogger.org/44539952122.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/dniajha/navifedojijub.pdfIn PDF document text
    • http://koreanluxe.com/subclinical_hypothyroidism_treatment_guidelinesvxvjb.pdfIn PDF document text
    • http://reduslimitaly-official.website/hotel_housekeeping_checklist_formatrgzbf.pdfIn PDF document text
    • http://cadenalia.com/android_studio_tutorial_w3schoolsdbrhh.pdfIn PDF document text
    • http://kawolamekepe.22web.org/questions_asked_in_teaching_interview_with_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujizadixupodur.epizy.com/fogefolorokijibepozago.pdfIn PDF document text
    • http://kovemipenege.rf.gd/notification_email_template_themeforest.pdfIn PDF document text
    • http://konevimojo.epizy.com/aluminum_panel_sheet_thickness.pdfIn PDF document text
    • http://wigazimo.epizy.com/cats_mod_apk_revdl.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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 5708 bytes
SHA-256: 3a2d009bb1face0069366a7402c2e1aa78909aaed7bfea1198e91d56c6b82a78
font_01_sfnt_off0000e9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 10608 bytes
SHA-256: 236b660edb7b5ec994b8ad516e0beab6b7c601b00b0f2f19e637ecd6be834f66

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