Malicious PDF — malware analysis report

Static analysis result for SHA-256 276c8218942c1332…

MALICIOUS

PDF

72.1 KB Created: 2021-02-18 05:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 51d38f968737363965fcb3c1a399bad1 SHA-1: 94466fb32c6e7de5d8963c857f0b26c2aca57cb7 SHA-256: 276c8218942c1332c4ffd951e79b5551813af505cb715652973fa12fff5b65fb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=applock+apk+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420939/normal_5ff2485983225.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/hMihgqK/twisted_sister_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/gghcife/92421840361.pdfIn PDF document text
    • http://erkutungotu.com/fefu_and_her_friends_meaningiaj3h.pdfIn PDF document text
    • http://izzzaaa.space/milokorefadasasuyxrkp.pdfIn PDF document text
    • http://antonio-ita.space/553380932592bokq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fee3f714111d.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/hmXksmd/vonuv.pdfIn PDF document text
    • http://gazzsheff.xyz/sentence_fragments_worksheet_3rd_gradeetjv3.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/jc7R1ua/operations_management_functions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5fd7d61cc758b.pdfIn PDF document text
    • http://jumpfs.space/offline_battle_royale_games_apk0kn0j.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/fasomusogapovi/cloning_dolly_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/31339355141.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/akreditasi_jurusan_di_ban_pt.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/android_file_to_external_storage.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_off0000df4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4C 4980 bytes
SHA-256: 5d304b82a5f2f5ec60b433f8234a4dab36f02f05b184ac655a2fe4b403c544e1
font_01_sfnt_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 10368 bytes
SHA-256: b23d44bce510ce650b3c04a66a0ac6b915fef13fd40c21f8afe2eece0c676489