Malicious PDF — malware analysis report

Static analysis result for SHA-256 b983eb84efb0be1a…

MALICIOUS

PDF

74.2 KB Created: 2021-06-12 08:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a5dfff4052f05d48ae5ac9fbec44d451 SHA-1: 0a621a29d82e3effb0b536c8021265b6e4225297 SHA-256: b983eb84efb0be1afdbe4914432837b406bae82690eab544b73afce9a5f7da33
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one prominent URL directing users to a page about connecting AirPods to Android, likely a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content.

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://pistant.ru/pbw?utm_term=how+to+connect+apple+airpods+pro+to+android PDF link annotation
    • https://pefeduvoxonix.weebly.com/uploads/1/3/4/0/134017609/8730230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_6020b694600b2.pdfIn PDF document text
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/linofibomuk-banero-tinamobu.pdfIn PDF document text
    • https://kizuwapeputatu.weebly.com/uploads/1/3/4/3/134375201/sarunutixiruni.pdfIn PDF document text
    • https://patelevikukel.weebly.com/uploads/1/3/4/6/134665122/3618402.pdfIn PDF document text
    • https://lisujawot.weebly.com/uploads/1/3/6/0/136024823/vovotokugukovevipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5fdad84360a66.pdfIn PDF document text
    • https://mawokuluser.weebly.com/uploads/1/3/5/3/135347786/repujulavosinawufopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_6055cfe4566f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_602f45db2a7bb.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/c72fcd9a-fb3a-45a2-af87-37522bbf9ad3/vapadonerupojeradidisatix.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/f/how_to_fix_samsung_dryer_not_drying.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/fojevekemetenusurideko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd81cb74-af9a-4a6f-a12b-a8e442bb2f67/31183798570.pdfIn PDF document text
    • http://vejivab.pbworks.com/w/file/fetch/144462165/play_game_win_real_cash_app.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/145122999/girl_voice_changer_online_free.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/f/warenedalugitonijuwoge.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144455841/materi_kuliah_akuntansi_keuangan_menengah_1_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b3dbc9-e99b-4ad2-98ca-b288bb797e02/72030853729.pdfIn PDF document text
    • http://gitefov.pbworks.com/f/how_hard_is_the_cpc_exam_2019.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_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5120 bytes
SHA-256: 18b119d1a56458738544355ca0a0cff71c175312a271c010a326afa73323a488
font_01_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 10516 bytes
SHA-256: b26ae824795c5b6b1afc60cf0befa493b434b5b314e64ca973a9a3382419f6f0

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