Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fceac469633ee5d…

MALICIOUS

PDF

69.2 KB Created: 2021-03-27 21:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1e68a5b01b7f6095d46494990abdea27 SHA-1: 24cff43a9a057c14ef37b60818c5645459bf6d05 SHA-256: 8fceac469633ee5d5e475f0173fd68aa2d9fffe56425631a9e400404469dc52b
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external URIs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the 'link farm' heuristic strongly suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/award?keyword=linear+equations+with+variables+on+both+sides+pdf PDF link annotation
    • http://xariketixagat.mypressonline.com/chaos_knight_40k.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/6jtEh2J/9467124003.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/playboy_song_mp3_download_djpunjab.pdfIn PDF document text
    • http://linza.media/911854095489qxnw.pdfIn PDF document text
    • http://presentinsta.online/patanjali_yoga_book_in_englishl7a9l.pdfIn PDF document text
    • http://delayikapy.xyz/793906418937dt76.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/ihhhgcN/5_seconds_of_summer_youngblood_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/bNW5Ohi/fesutetowifebewufivo.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/vissani_model_mcbc58dst_not_cooling.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/hVjfJpg/occupational_therapist_education_requirements.pdfIn PDF document text
    • http://civiliscmq.online/pagudagusawafaronopopewxfi7o.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/ejhhfuA/stick_cricket_live_wiki.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/kalnirnay_calendar_2020_marathi_july.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/ab6172b0-7f14-46d0-9017-7119f36b59f3/tekewedujufilidaxi.pdfIn PDF document text
    • http://fopajika.epizy.com/flir_one_gen_3_problems.pdfIn PDF document text
    • http://folapopapewoxa.rf.gd/panat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b67de12-0948-4eb7-82f7-f098f9fa95f1/tijaguwi.pdfIn PDF document text
    • http://wujasulo.epizy.com/4861065063.pdfIn PDF document text
    • http://vufuxit.epizy.com/73336515057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7413963d-d822-49cc-a126-8e3f6c0d3e6e/26755345026.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_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 5488 bytes
SHA-256: d2d0f835674a63fec7519a46063ccf7d9b7292ff1ba559cf9421be6cd1c6fd76
font_01_sfnt_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 10928 bytes
SHA-256: 2a8389488dcd50f3cadb626d6729e49176f13ec95949817f75032da3965dd8aa

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