Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb82b7f58c4f34a…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 04:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 68f5247a8a016d9459995baa3fcdbcb9 SHA-1: 547381355735718376600bba8110489986d3adc2 SHA-256: 6eb82b7f58c4f34a0b263d54a4cc64a72c605e087e07d0923c3f539a163f1289
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and employing UTM parameters, suggests a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Java jre 64 bits windows 7', aligning with the lure of providing software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/123?utm_term=java+jre+64+bits+windows+7 PDF link annotation
    • https://cdn.sqhk.co/lunexubafexo/ji7hib9/bus_simulator_2015_original_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/hbp6jhC/femeverususapivuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/difejekexe/ThfxsxN/usa_field_hockey_futures_regional_tournament.pdfIn PDF document text
    • http://hookup157.fun/512393120969itgw.pdfIn PDF document text
    • http://ecoterritory.store/albion_online_requisitos_androideu715.pdfIn PDF document text
    • http://verifedform.com/the_female_brain_reviewrfj1h.pdfIn PDF document text
    • http://sweetygirl.club/pilovafimof26nqd.pdfIn PDF document text
    • http://flylovel.com/natebivixivelowulogifatbzow.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/zewimolek6aj5.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/adventist_youth_hymnalg0ldu.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/g70gcaE/gravity_bong_vs_bowl.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/sgf3hbn/aesthetic_wallpapers_for_laptop_butterfly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa7d965-f1b9-4ad0-aee6-8d047b055075/21800918318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4990d4a7-0a8f-48c2-b780-09251811153d/jinokopimenifevisokex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9d8f75-25fd-425d-b993-7f895508d712/gmat_practice_test_software_free_download.pdfIn PDF document text
    • http://jiliwajomagob.rf.gd/sso_id_ki_full_form_kya_hai.pdfIn PDF document text
    • http://xujalupa.epizy.com/capital_iq_office_plugin.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/vupifu.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/ejercicios_clases_de_sustantivos_4o_primaria.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/android_app_emulator_for_ipad.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 5464 bytes
SHA-256: a425782ea7900df8db0cd8e5802da034042e0c230feb0840add1f181337aecc3
font_01_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 10596 bytes
SHA-256: f9588fbf9d9a6d8f5cdf4b37d3841e09af179cb18aa26fd49f98a37b65596ac6

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