Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dd3095d5be08ad…

MALICIOUS

PDF

73.8 KB Created: 2021-03-05 16:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ba89bfc69015af2f2621253bedf105f4 SHA-1: 122278b746fa5f1105fd687c65d5826170ef3196 SHA-256: d1dd3095d5be08ad917475f0a16216cdbddadd7a78f62ca471f46ae133bf12be
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links points towards an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=momentum+worksheet+3+answer+key PDF link annotation
    • https://cdn.sqhk.co/zezetemirag/pjfsB7V/68486372183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5fd7c9b52e22e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470218/normal_602d9546ad0ab.pdfIn PDF document text
    • http://zelenege.iblogger.org/logo_design_templates_illustrator.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/sjesifv/7182392818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_60186bc322b20.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/40941075603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5215c6-d628-4bce-a9de-50aface8993d/walt_whitman_quotes_love.pdfIn PDF document text
    • http://rerivumisiso.rf.gd/pavitra_bandham_songs_naa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c158bd4a-df93-43bd-a336-d767a15bce14/1806970965.pdfIn PDF document text
    • http://dipijiz.epizy.com/freundliche_absage_angebot_formulieren.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/25790651153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d177fd73-007f-45fd-81a6-2646202a4e15/ronudarib.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/ronubo.pdfIn PDF document text
    • http://gamugeko.rf.gd/autocad_lt_2019_system_requirements.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/196905513.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/kajat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a105e15e-35d8-4dd5-ace6-3dcf5c4c3124/handy_stitch_instructions_en_franais.pdfIn PDF document text
    • http://dusekamalebe.rf.gd/height_limit_for_rides_at_movie_world.pdfIn PDF document text
    • http://narumigopu.epizy.com/89922635856.pdfIn PDF document text
    • http://jaxegowanav.rf.gd/kufi_calligraphy_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/video_adda_app.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_off0000e480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 5320 bytes
SHA-256: 6f7d108885e7ffecd0f14180c0351bc2f41e2dccdd8c7d981bdc6153cf69a202
font_01_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 10364 bytes
SHA-256: 9f42320f85ae1a3132fe1a4f3077cb74388f3f31505b0c346e4748b0a7520185

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