Malicious PDF — malware analysis report

Static analysis result for SHA-256 37afb7af6388cc43…

MALICIOUS

PDF

70.6 KB Created: 2021-02-26 03:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b00133d8c8f9ce49137eb4019a9012df SHA-1: d1d1cc76f443a3823f7130fcb0712fb6da3d3929 SHA-256: 37afb7af6388cc433eefbe49cca277cc12ce01e0a5d21e893cdceae6e3db6cc5
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=how+much+does+a+security+account+manager+make PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473384/normal_6013bce21cf05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fda862f7c7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_5fe7f15fe84cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475406/normal_5fdf2ee062002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5ff68ac10763e.pdfIn PDF document text
    • http://fibewoz.22web.org/jubupuxekusololizitafopem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fc59792a7284.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/setolibokuxup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_600dca5f12424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_60271dc88c1cf.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/supply_chain_management_program_online.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/microelectronic_circuits_sedra_smith_6th_edition_solution_manual.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/95937128214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_602eae8e92299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokiguxesixup.epizy.com/5554450434.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/vasika.pdfIn PDF document text
    • http://notaruk.rf.gd/reference_page_for_job_template.pdfIn PDF document text
    • http://bojibag.epizy.com/the_school_white_day_android_apk_home.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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 5540 bytes
SHA-256: 9d99d692596d7d81055381d1af56f97dd09d5cc740f020d794b3c71c5ec8c45b
font_01_sfnt_off0000e9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 10472 bytes
SHA-256: 593bb575b6d2e99289f6405ea957f9489429f9cc102f6336dd927b66e1982b21