Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28ffe6fca5d154c…

MALICIOUS

PDF

68.3 KB Created: 2021-03-01 07:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eb5fb35a9476508af08c0095bcc96fb6 SHA-1: 7f03ec45995b36cda987ad588696367d4d01f909 SHA-256: b28ffe6fca5d154ca1e17eb8e24d76af1ce6f7356aa862d4c6b058bb13a40e5b
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://zajinet.ru/award?keyword=logo+quiz+guess+the+brand+answers+level+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465128/normal_6010a6e8bbede.pdfIn PDF document text
    • http://mibosaputir.22web.org/92809608714.pdfIn PDF document text
    • http://zajifokabatu.iblogger.org/likalokokopinutoxunokup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_6025978d8bae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_6039f7d8cb5e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495973/normal_5fc6494edd0e4.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/hbJgfPe/lasakosasinelamadajabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_6027ec5b5527d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_60343a765a3b5.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/cjegfvM/epic_battle_simulator_2_hack_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/3hafWEW/tamobol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5fd995f141b4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupuvesonema.epizy.com/notepad_plugins_manually.pdfIn PDF document text
    • http://zuromor.epizy.com/cognitive_behavioral_therapy_exercises_for_social_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/456185169.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/87413999287.pdfIn PDF document text
    • http://kukatunudivolu.epizy.com/gukexoxanegoripowe.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/ammoniac_formule_semi_dveloppe.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/primary_dysmenorrhea_guideline.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_off0000cd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8C 5660 bytes
SHA-256: df9fc8ce4e4712e5ef0834f07117cfe3ee69fc840dfc77ca566a0647acc987e9
font_01_sfnt_off0000e0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 10424 bytes
SHA-256: a06b1ab5a088633cac91f3be77ecfcc690afb836da7dfe4b1776ac97ce30e252