Malicious PDF — malware analysis report

Static analysis result for SHA-256 93875d2e998bfbd9…

MALICIOUS

PDF

80.8 KB Created: 2021-03-21 07:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 16209de2742b1875ae25529d6a97d312 SHA-1: 592131832728bec0bc4eea3e8f779868833b2729 SHA-256: 93875d2e998bfbd978cc3d93889117ff3b73ed78b936aac71cfcb95b6ef52f75
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=economia+do+meio+ambiente+pdf PDF link annotation
    • http://kozidozilujivox.getenjoyment.net/black_mens_wavy_hairstyle_short.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/jenis_batuan_sedimen.pdfIn PDF document text
    • http://jupomolitage.22web.org/bls_guidelines_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_60537479323b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501509/normal_5fff24d47b7d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392857/normal_5fdf30dbe4936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_6053ed2d8696d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403270/normal_600660b9f077e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sefozutobikawu.epizy.com/gnossienne_no_1_piano_sheet_music_free.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/porter_cable_bn125a_not_firing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba44d2f-e83e-4d86-aa68-99572ed1514b/business_analyst_certification_courses_in_bangalore.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_81f7f8c06b4c48bda7d10d71874fe9fb.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_48c7826ac548474196a3dd3a69ec83f1.pdf?index=trueIn PDF document text
    • http://rodedewezijore.atwebpages.com/factores_ambientales_bioticos_y_abioticos.pdfIn PDF document text
    • http://dilalixurapa.epizy.com/suginokopamataxojigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc3c125-2565-4808-a865-d784570063cf/84278852393.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/kaworalimitakobekoju.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_a5406f0c2e7345c98608973d26769a1a.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_3044452e24cf4d30b1a868475dce2ac3.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_97238e474f89438196f77a801eca97f9.pdf?index=trueIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_0a118e59835e4034aa76577c3e492437.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 4880 bytes
SHA-256: 5aa7c317698db3e7658f7a9bcc7fd04e30b8c3162deae9acc58f8a98c65e474c
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 14372 bytes
SHA-256: 2a64ca5f123d75cdc16a97208bf10bc84915dbdc09a077ebfc32fa6e4043c64f
font_02_sfnt_off0001260b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2