Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2320e075284e757…

MALICIOUS

PDF

75.4 KB Created: 2021-05-03 04:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c6750dfff7923050fa9ad16893aabb3d SHA-1: 2523c3b64c9729de976a7a8cd89cee137be99c4e SHA-256: f2320e075284e757d0f7f8fd4821a2ba74c1cd9746afd97e25ff92a9c3ab8ca4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, with the primary one leading to a suspicious domain ('jottigo.ru') that is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to 'installing windows 10 for free', a common lure for such attacks. No scripts were extracted, but the presence of numerous external links suggests a redirection to a malicious site.

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/strik?utm_term=can+you+still+install+windows+10+for+free+2020 PDF link annotation
    • https://cdn.sqhk.co/sategexarom/ebjgib5/babikelagalanebelupikofus.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/MjdtdeZ/bawolasukumorurupumowumox.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/GDDmghj/daguv.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/Wdgesja/rpg_character_generator_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wopeporamo/fifnKiw/kafumofabetemizix.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/Ciasjgm/dumofifuze.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/3AhbYb3/school_days_android_gameplay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajiwewovipu.epizy.com/causative_exercises_2o_bachillerato.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/58091144152.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/calibre_ebook_pour_android.pdfIn PDF document text
    • http://badiwofotafazol.epizy.com/simple_biodata_form_free_download.pdfIn PDF document text
    • http://wigikel.rf.gd/27595442655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46279ee3-d014-4cee-9468-587a5c4b5961/motorola_router_sbg901_password_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1cd907-2165-47e6-8b21-9df8a74f5244/application_definition_blacks_law_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/analytics_edge_edx.pdfIn PDF document text
    • http://nelifofufotilep.epizy.com/ar_rahman_hits_tamil.pdfIn PDF document text
    • http://ragigixo.epizy.com/nabadokiwomipuwik.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/74773665116.pdfIn PDF document text
    • http://dalejavevofa.rf.gd/harry_potter_8_films_box_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb681d35-1f76-4e74-bbc9-dec0bd2cdd14/paulo_coelho_the_alchemist_movie_trailer.pdfIn PDF document text
    • http://denuvifateve.epizy.com/stacy_s_mom_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683e7934-d5be-4e4f-b515-f5ea9d774406/why_has_my_steam_cleaner_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9fcf0e-af37-4fb8-b042-6b89d546615b/keurig_2.0_maintenance_kit.pdfIn PDF document text
    • http://zovulebipa.epizy.com/dowigufaror.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_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 5328 bytes
SHA-256: cba81f4e5207beb58c63bb59f52ffd89ca00ff6c663209e62954cc1d87f4052d
font_01_sfnt_off0000fa0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0A 10512 bytes
SHA-256: fd61b2988ce789437ae1aad2db65efb8ea584e77349e41e18c7030a0ab5fe740

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