Malicious PDF — malware analysis report

Static analysis result for SHA-256 b768364855c86419…

MALICIOUS

PDF

90.7 KB Created: 2021-02-26 18:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 15d572c86adb49c891c8179170e5d413 SHA-1: 21759ef47a45b6eadc1849690c1fff898b744010 SHA-256: b768364855c864197bd98d6e8af992d3eac48d180a5717189e8804f7fb25c0d9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'e learning storyboard template powerpoint'. No scripts were extracted, but the presence of many external links suggests the PDF's primary function is to redirect users to malicious sites.

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://vilenefex.ru/123?utm_term=e+learning+storyboard+template+powerpoint PDF link annotation
    • http://cardioactiveuficiale.site/tutakuwapanozidebel0p70d.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/16715488439.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/58373177748.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/what_are_the_elements_of_a_horror_story.pdfIn PDF document text
    • http://avtovishki-msk.ru/service_business_income_statement_template66wt9.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/eyelash_extensions_certification_near_me.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/67429913645.pdfIn PDF document text
    • http://biolinkus.me/xuvuzunatezobyx9bw.pdfIn PDF document text
    • http://autolombardpro.ru/5279557963328kqo.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/14421690235.pdfIn PDF document text
    • http://cardio-active.site/naughty_boy_and_zaynei2mn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sokurunofizune.rf.gd/nadunuvene.pdfIn PDF document text
    • http://wepaxilex.epizy.com/ogame_fleeter_guide_deutsch.pdfIn PDF document text
    • http://kozusabupo.epizy.com/30227092620.pdfIn PDF document text
    • http://rimaxuj.rf.gd/caller_tune_song_wapking.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/81933015765.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/indefinite_integral_simple_problems_with_solutions.pdfIn PDF document text
    • http://rovetenexosa.rf.gd/cunto_tiempo_tarda_un_residente_en_arreglarle_a_su_esposa.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/whatsapp_iphone_4s_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/ascension_deckbuilding_game_guide.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_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 5356 bytes
SHA-256: 02750ab207a93cbf4a51ebad1e36ec471bdcb9b063a7d4cc50b8d8b1004c6827
font_01_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 11768 bytes
SHA-256: 36606e826b40a9b9cb8549a5f46ba762b030c0297507e051206ed04f1d5a4c6e
font_02_sfnt_off00014f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F4A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.