Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5de092dd0e7b396…

MALICIOUS

PDF

76.6 KB Created: 2021-03-14 22:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ca076891f76b7b36333ae67989370785 SHA-1: 28c80dab429fbea0c869734389ae4e593a6adaea SHA-256: b5de092dd0e7b396f2287bd3526cd2a1cdd78dc4485a0b24ae09d0f0e3fcf4dd
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=logitech+extreme+3d+pro+joystick+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479902/normal_6020556adf92e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483345/normal_5fff39532e7b0.pdfIn PDF document text
    • http://revafazamige.iblogger.org/pijirojanopapaxonurevun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457839/normal_6003637000874.pdfIn PDF document text
    • http://wiinorama.space/flow_chart_of_central_and_peripheral_nervous_systemtjj34.pdfIn PDF document text
    • http://olivamebel.com/how_to_paraphrase_textsmoky.pdfIn PDF document text
    • http://praktika-ingenieur.com/korean_grammar_in_use_beginning_to_early_intermediate_free1t1la.pdfIn PDF document text
    • http://emirofficialzm.com/susefujojafadovilodetedckoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_603c25f124e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5fe9cb2d42f72.pdfIn PDF document text
    • http://usmileofficial.site/tujibevuzowalidexonif4wa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sunivope.rf.gd/binocular_microscope_parts_and_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/94023107460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706ae4de-c42c-41a5-bb86-961a32ea0611/69687621030.pdfIn PDF document text
    • http://gerosopidazab.rf.gd/curso_de_violo_para_iniciantes.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/who_are_the_best_stock_brokers.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/60694036965.pdfIn PDF document text
    • http://pikazunelovo.epizy.com/donupimixa.pdfIn PDF document text
    • http://mujusamufi.rf.gd/love_poetry_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/mosefuwasapaliwebupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957da884-2025-40f3-96c3-da72201faaa5/55596467150.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_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 5984 bytes
SHA-256: 35cfaa51e1b75006d25131ff20a15ed2e99d5d04939662187cd3f454c9def72f
font_01_sfnt_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 11960 bytes
SHA-256: f6819603ccd20c68c0212568c64cf06a02fab4c2a467c11222b7e5bc6e220119

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