Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f577e628342df2…

MALICIOUS

PDF

71.6 KB Created: 2021-03-05 09:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 35ff1b9681845d01fb6446d18667fcd0 SHA-1: 129922bf4ca3a273240f48b30c4e04c5c2d6b4ad SHA-256: 12f577e628342df29b86b71c9e0195539d4fa8cf5842e00b14e83057fd0ae821
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/award?keyword=what+do+u+mean+by+human+resource+management In PDF document text
    • http://zawugexoj.22web.org/human_geography_definition_in_english.pdfIn PDF document text
    • https://fozipapuratub.weebly.com/uploads/1/3/6/0/136088586/jukeluzik.pdfIn PDF document text
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/serixurimuberidezadi.pdfIn PDF document text
    • http://fezusixikizagu.iblogger.org/wojitogikumugibavodozezar.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/42600154715.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/sawizatotinitu_mugojamimadi.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/d7dd710488ba9f.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/29b0cf1a8e.pdfIn PDF document text
    • https://nemamalalebu.weebly.com/uploads/1/3/4/3/134357173/5952935.pdfIn PDF document text
    • https://rekizutor.weebly.com/uploads/1/3/0/9/130969391/laxupuvasukegorer.pdfIn PDF document text
    • http://durugara.iblogger.org/lesekilokasifopu.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/dexibal.pdfIn PDF document text
    • http://kemijejanurag.iblogger.org/rexagi.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/degisapemifa/jaleregopeseziz.pdfIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_bdf5f2c0fc6f464a9df64931d179df2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zizene/curse_of_strahd_ireena_age.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/med_surg_nurse_certification_review.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_afc105940e4546078800819131ebd922.pdf?index=trueIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_a4fa8d30f39b428c91513b3dd17692a3.pdf?index=trueIn PDF document text
    • http://gafeguxabodow.rf.gd/90575190456.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_ec8598548c13433fa8e8232186432ab5.pdf?index=trueIn 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_off0000d95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95C 5576 bytes
SHA-256: 3841da7dfc8ebcf70b45d6c1dd097e833cc439fbb2be00efd273fe772490d3b5
font_01_sfnt_off0000ec36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 10720 bytes
SHA-256: e999e438c8968898a3e51560afbe8e2ca674e38892cfebc2acfbf4447710ae90