Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7a63e3752d81ab…

MALICIOUS

PDF

78.4 KB Created: 2021-02-21 05:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3d5f7ab87c4cef15a423b3382034a0b2 SHA-1: 62a393ef518f90546a49d492f7193262283456c4 SHA-256: 8c7a63e3752d81abb3e89338720cbbbe69e619e8858d4be2cf9141e89b27d755
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/123?utm_term=computer+hardware+notes+in+urdu+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445343/normal_5ff28662c2a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_60290a28a3247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_6018aee275fa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473375/normal_5fc68f6eeb13f.pdfIn PDF document text
    • http://zavodtriumf.com/mcent_browser_app_androidabh4n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_5ff15447d4784.pdfIn PDF document text
    • http://lavumosilewu.22web.org/29750338331.pdfIn PDF document text
    • http://maletewidulebil.iblogger.org/14422444990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492892/normal_6010c4808f62f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_6015ddb9cff00.pdfIn PDF document text
    • http://dommasters.site/why_is_my_wifi_randomly_not_workingm2m6w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_602fb8265528a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_60174abb66d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_60135d1a5dbdf.pdfIn PDF document text
    • http://flowerport.market/bitofowahpgkq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nulidofa.rf.gd/15618351177.pdfIn PDF document text
    • http://witosef.rf.gd/girudizon.pdfIn PDF document text
    • http://julukawava.epizy.com/how_to_find_the_maturity_date_of_a_loan.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_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 5276 bytes
SHA-256: d1c18a2a12657146c714406b31796724a7af3ac0c065276e3256df4742996f43
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 10816 bytes
SHA-256: 2115a0462b4c9775f303642e21ad43ae330d8785981b5915cfd064f836ca4761