Malicious PDF — malware analysis report

Static analysis result for SHA-256 8772f90d8252f18f…

MALICIOUS

PDF

89.6 KB Created: 2021-01-22 23:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c6264cafa8b052ae8137dc4e1765e71 SHA-1: 33c1be2dde5413ed9ebe7c310f3a3f2ec9ad98f2 SHA-256: 8772f90d8252f18fe3f422549f0ac8b948d2e060bf3718de7c3a17be1c84bf8b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wb?keyword=famous%20striker%20soccer%20players PDF link annotation
    • https://vimitorumu.weebly.com/uploads/1/3/0/8/130814921/50d0b16.pdfIn PDF document text
    • https://wabomojufodeze.weebly.com/uploads/1/3/3/9/133999178/kutojorezuv.pdfIn PDF document text
    • http://pubomoxagu.22web.org/rosidedesuboniwizufowos.pdfIn PDF document text
    • https://lixepugoguzezum.weebly.com/uploads/1/3/4/1/134132265/zodesemusarofi.pdfIn PDF document text
    • https://lolejubabam.weebly.com/uploads/1/3/1/3/131379737/zepuduleluxap.pdfIn PDF document text
    • https://site-1175656.mozfiles.com/files/1175656/poker_offline_mod_apk_free.pdfIn PDF document text
    • https://pemiroma.weebly.com/uploads/1/3/1/3/131383733/89d6ab.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/dopugo.pdfIn PDF document text
    • https://lorolefe.weebly.com/uploads/1/3/1/8/131871725/dd1f98bbb7.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/6896282.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/guwonujalafudiwap.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/CHijYja/kid_city_store_brooklyn.pdfIn PDF document text
    • https://site-1189081.mozfiles.com/files/1189081/clinical_cases_in_anaesthesia.pdfIn PDF document text
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/gekabesufoguvowate.pdfIn PDF document text
    • https://site-1176953.mozfiles.com/files/1176953/20905643443.pdfIn PDF document text
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/dopazobozuloteve.pdfIn PDF document text
    • https://fubareno.weebly.com/uploads/1/3/1/4/131482864/wudelaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejefuwozumij.rf.gd/3rd_grade_math_staar_test_practice_worksheets.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_off000123b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B2 5200 bytes
SHA-256: 024132325a248356146b22642bb545b3c0ee012bc06675deb83fb356f0ecb42b
font_01_sfnt_off0001355d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1355D 10800 bytes
SHA-256: af7f61b655a31192641af110deae954f49ebcbbd9ceb17915527f0e6de5d8c36

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