Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4668ba2c94454e3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-24 09:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5a7677957cb58beb4d690c8ba8f2a492 SHA-1: c09a51bf178dedfb5639e63f12fe3ad9284375c8 SHA-256: e4668ba2c94454e30778ddf17ba1869213886be1c642ad917ee71b7a9ed1206f
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and one specifically flagged as a link farm. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ponafet.ru/award?keyword=acquisitions+inc+book+pdf PDF link annotation
    • http://bestrongbyg.com/76131641449o4nv8.pdfIn PDF document text
    • http://khareedforosh.com/nyimbo_za_bongo_fleva_za_zamaniv8jol.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/nLjehdO/ginowosezusoge.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/BjcpgeO/learn_c_for_game_development_freecoursesite.pdfIn PDF document text
    • http://pro-konditer.com/55988198545k1q7i.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/jhBhaZ8/vojederogemizomazaxer.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/iOiyqjg/jovolaxufepemugil.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ighieNK/53866776438.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/all_video_player_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a299c5d-6d59-43f6-8a86-67dfa8b1a1ef/world_war_z_cast_members.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eafeb00-78d8-45d9-89c1-04260198a31d/when_should_a_relationship_become_facebook_official.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064df409-521f-4cca-a40b-6ef2c65d2719/71025350135.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/mimukasegejolumunene.pdfIn PDF document text
    • http://mafofeguf.epizy.com/zimamuzuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4300ca-11f6-4a9f-a222-f73e05c064a1/junji_ito_collection_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/wipuzavido.pdfIn PDF document text
    • http://midizigikeg.epizy.com/in_christ_alone_song.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/univariate_anova_reporting_results.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/how_to_use_query_in_microsoft_access_2013.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_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 5132 bytes
SHA-256: f1fa8feab622211f96af02ee62283fc2754aff617cb009b6944fed68e26abb13
font_01_sfnt_off00011491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11491 11452 bytes
SHA-256: 0b2bf74e21c0883ec3992218bbbbba0c7373db429bcb3c2647254896722fa65b

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