Malicious PDF — malware analysis report

Static analysis result for SHA-256 c203b83bbab6dae5…

MALICIOUS

PDF

73.4 KB Created: 2021-02-14 22:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0bb2acc426304559bc890c0926e98f6f SHA-1: 722c958dd3beed648d7e7f3282a8970f0434e826 SHA-256: c203b83bbab6dae526ad76d112359afbe35befdd76a29b022b824049072fce5c
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=nacho+libre+bike+scene In PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_601d7882276f3.pdfIn PDF document text
    • https://dovidememalow.weebly.com/uploads/1/3/4/6/134601329/vavagitikox.pdfIn PDF document text
    • https://zevofukuje.weebly.com/uploads/1/3/4/5/134585027/lupumeripurajis-vabarovaxiwebil.pdfIn PDF document text
    • https://buxomajuse.weebly.com/uploads/1/3/4/5/134588570/6672fca.pdfIn PDF document text
    • http://nukuxarigikuxez.iblogger.org/9994072423.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fce0a6ab934e.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/angular_2_form_validation_example_plunker62x06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_6019ab2ce4432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd1125710caf.pdfIn PDF document text
    • http://jexufiw.iblogger.org/pazagepisuxaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/66710550052.pdfIn PDF document text
    • http://nabajorugum.rf.gd/xutuloxetoso.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/merry_go_round_poem_question_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/62893024264.pdfIn PDF document text
    • http://moxirekix.epizy.com/dofakixufodufavalew.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/woguxeborufuzuzusal.pdfIn PDF document text
    • http://xafuvarajuxeg.epizy.com/23091930225.pdfIn PDF document text
    • http://vevojadiren.epizy.com/foserigeralexaza.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_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 5060 bytes
SHA-256: cb487fd15ee1b9088246bb2aff0171377d1ec6e3b8ef760ce59708fc835b5f34
font_01_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 11336 bytes
SHA-256: e9d883e7601350b964401a092e2857669c90078be10b618d12d15e580f53fb7c