Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b97767d24330368…

MALICIOUS

PDF

93.2 KB Created: 2021-03-24 22:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9dc2afc4953cd6fbd527d51cf8ab93be SHA-1: 2bd5f3b53f105e4a25c66e8c2193eca90be3bf6c SHA-256: 0b97767d24330368f5234dde4ffa8fe25eee5a89bef0105b7c0adc48ddbdf0bb
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the sample for its structure and use of disposable hosting, reinforcing the phishing/malware distribution vector. No scripts were extracted, but the presence of many external links indicates the PDF's primary function is to redirect users to potentially harmful websites.

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://jottigo.ru/123?utm_term=spring+resttemplate+application_form_urlencoded PDF link annotation
    • http://4escam-bot.online/paxidosabhisdf.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/how_to_make_crock_pot_chili_thicker.pdfIn PDF document text
    • http://medway24.com/nuzakogimedw3vdu.pdfIn PDF document text
    • http://lishop.site/atlas_bonus_poednhjw.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/autocad_crash_course.pdfIn PDF document text
    • http://xovasaf.iblogger.org/luxury_travel_guide_awards_reviews.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/72214121975.pdfIn PDF document text
    • http://jobware.pro/femesiketecok.pdfIn PDF document text
    • http://okrasote.info/xosoxexokirubivipub6v41.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/what_is_reflection_coefficient_in_seismic.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/world_history_final_exam_multiple_choice.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/insect_population_ecology.pdfIn PDF document text
    • http://zivepixafusav.22web.org/alliteration_assonance_and_consonance_worksheet.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/ages_and_stages_social_emotional_questionnaire.pdfIn PDF document text
    • http://newyearshop.site/470302296629iii0.pdfIn PDF document text
    • http://complect-tech.ru/instagram_community_guidelines_updatew76w2.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/fundamentos_tecnicos_del_voleibol_wikipedia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafozega.rf.gd/two_column_responsive_html_template.pdfIn PDF document text
    • http://tusajemepo.epizy.com/zoxolebeduwodoni.pdfIn PDF document text
    • http://siwerixu.rf.gd/bendy_and_the_ink_machine_apk_apkpure.pdfIn PDF document text
    • http://vekibavekuje.epizy.com/online_video_er_web_browser.pdfIn PDF document text
    • http://pesezozeve.rf.gd/ribigivunesa.pdfIn PDF document text
    • http://pitepune.epizy.com/back_number_shiawase_album.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 14164 bytes
SHA-256: d6d753ffd99fb073042bd286db651cd478c55c3c4bb556cf24d03489d6551ad1
font_01_sfnt_off000121b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B3 5608 bytes
SHA-256: a0e2d580f11b3ed92dddd67eb184dcad3de7a4314d179f6a5030c764ffa558cd
font_02_sfnt_off000134c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C5 18348 bytes
SHA-256: aae719e3ce1d16191e75f9d9c27bc0ac00c1a884fa6eb296ed5bea174467637f

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