Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1198353278260c…

MALICIOUS

PDF

78.1 KB Created: 2021-04-02 00:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3122d3fd0807658ac0bd2a26e4185df6 SHA-1: dd6aa8113894e771f5b1b34147ff800a0c314fdb SHA-256: 8e1198353278260cfb97ced6ba7ffa73807433ae833bc4f82bf0f2a0fce1fe12
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing a trojan. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a lure for downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/123?utm_term=action++crackeado+2019 PDF link annotation
    • https://cdn.sqhk.co/rifibimilo/icKhajj/sql_database_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_602812f2b6e44.pdfIn PDF document text
    • http://megantv.site/how_old_mila_kunis_that_70s_showr2hr5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385217/normal_5fdefa72236cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_6031bca90e7ce.pdfIn PDF document text
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/6659595.pdfIn PDF document text
    • https://pagapepekajarop.weebly.com/uploads/1/3/4/3/134307963/mikazimipojuze_xejabe_degepuzikezixi_poxaleralawuju.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/iieggWD/twisted_metal_ps3_metacritic.pdfIn PDF document text
    • http://dorightunion.com/malayala_manorama_epaper_download_alappuzhahihl1.pdfIn PDF document text
    • https://kakabotosor.weebly.com/uploads/1/3/0/7/130775724/nugadepidige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_60385fa11e9ff.pdfIn PDF document text
    • https://zaketedojerobi.weebly.com/uploads/1/3/6/0/136023974/bowez.pdfIn PDF document text
    • https://metuwudoguwo.weebly.com/uploads/1/3/5/3/135323448/ea4d5bead537f1.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/xubufenavo.pdfIn PDF document text
    • https://cdn.sqhk.co/lamijaluxeso/hccgija/printable_coping_skills_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_6024884295fee.pdfIn PDF document text
    • https://sibuzowad.weebly.com/uploads/1/3/2/8/132814892/wikurovav-fakexuwo-papijoxari-kelaxagefixadub.pdfIn PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/jd0gjhi/movie_maker_app_free_download_for_windows_7.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/2142623.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/do_mini_dv_tapes_deterioratev1esb.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxizavex/gjihicI/amplify_curriculum_answers.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/76ff6f72-990c-429d-a859-59bc32f838e2/47443505890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebc51e6-cc25-4b92-9570-e87c76f06bd6/whats_another_word_for_confidence.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_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 5256 bytes
SHA-256: 355a8e821520b98e2af6ba00827874126289b757fd5be8d330f0ef639ad71fb2
font_01_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 10868 bytes
SHA-256: 71ecb3f246e791594bfc709e1d1b8fda81029a0a75384bb35c2e6bdff2f68d59