Malicious PDF — malware analysis report

Static analysis result for SHA-256 371a62bbe8d32dc7…

MALICIOUS

PDF

81.3 KB Created: 2021-02-18 21:31:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f5fad01d45dcdc5f1aa404ef4beace44 SHA-1: 479985e33b34de31c4ded9e6a444d53360c75407 SHA-256: 371a62bbe8d32dc74b52a0c459d87d1554a17d15b90505c4bad903e196594c62
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or link-farm-like infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=arrepentimiento+significado+b%25C3%25ADblico PDF link annotation
    • http://sasezifunapa.iblogger.org/bharat_all_song_mr_jatt.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/Ujghiid/i_wish_you_love_original_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/cNiehjd/nuponakatidetufos.pdfIn PDF document text
    • http://swast-group.website/teachers_pensions_auto_enrolment_letter_templatesxoe7r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_600109174437c.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hbihDee/warhammer_40_000_space_wolf_review.pdfIn PDF document text
    • http://samo-katim.ru/card_jitsu_club_penguin_rewrittenz2uf8.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/hgij7Ja/zavudulid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_600ced62b2d44.pdfIn PDF document text
    • http://3203epworthcres.com/taxonomia_de_bloom_verbos_para_objetivos_especificosuo41g.pdfIn PDF document text
    • http://rmk4sale.xyz/wapking_dj_song_201872ioc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5fc99af4de6e6.pdfIn PDF document text
    • http://rmk4sale.xyz/bioquimica_medica_baynes_4ta_edicionugbds.pdfIn PDF document text
    • http://inscarusa.info/82161820590me41f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_601d8c80ebf8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458633/normal_6008c880404cd.pdfIn PDF document text
    • http://uspex22.online/bts_vma_2019_performance4sfjv.pdfIn PDF document text
    • http://vinoxulib.iblogger.org/ballade_pour_adeline_piano_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408858/normal_6004bbe183fb9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soxalisaxofaba.epizy.com/cfx_solver_modeling_guide.pdfIn PDF document text
    • http://mojadifo.rf.gd/badmaash_company_movie_mp4.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_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 5660 bytes
SHA-256: e25a0f36117ebdfc539b19fca8b13a117362f47b2af5c4f4ac6034d099fe725c
font_01_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 11444 bytes
SHA-256: 95f0d298740e86aea46d2a5bedbf05018340a798691ca51d7f97656a8378da6d

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