Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c63d9cc02b239b…

MALICIOUS

PDF

72.4 KB Created: 2021-02-11 05:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fb2d18430d1174f7cdde1f450e3928cd SHA-1: 29b668e2f8fbb33b9c9042e0864ddc284912ff78 SHA-256: b4c63d9cc02b239b4e24e3d216706e7a0fe58d00af80bac2c64abba47982651c
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://baarspo.ru/aws?utm_term=cats+and+dogs+2+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423714/normal_600ffae944bda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481671/normal_5ff5105cacc91.pdfIn PDF document text
    • http://fexuvukenix.22web.org/college_algebra_midterm_cheat_sheet.pdfIn PDF document text
    • http://stroiline74.ru/grizzly_bushcraft_pocket_knifezx036.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/2eb5b42f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5ffe092f621c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5fd7a33f73727.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/sejozizutadepoferigu.pdfIn PDF document text
    • http://beststudent.fun/bajaj_bike_insurance_policyrkrk4.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/wunidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420468/normal_5ffbbd88b2616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_600f5a850f771.pdfIn PDF document text
    • http://axacheat4.xyz/intro_stats_deveaux_4th_edition_downloadt7ssl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taxowojo.epizy.com/25119965891.pdfIn PDF document text
    • http://rarejis.epizy.com/1288091487.pdfIn PDF document text
    • http://wepezip.epizy.com/67919951422.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/song_boulevard_dan_byrd.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/10741148583.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_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 5116 bytes
SHA-256: 9a987a8e2d1d3e49fe8e363eac74561c2793108e82ff188aeee1f6808fb4788b
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 11892 bytes
SHA-256: 2625da86835394f030347af9774e060a9f0beefad1626cf1a3860cfbe5d393e2