Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32b32e319c4b868…

MALICIOUS

PDF

99.1 KB Created: 2021-03-03 06:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 88f8677e976bb4497253bbe422b6d478 SHA-1: 7e5083a68119ba07060cbf36d86a08c92258d39f SHA-256: d32b32e319c4b868372f2ca71b2dd2d89773904df9b57690e15750fbe1592b8c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO poisoning tactic. The presence of multiple external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF with high confidence.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/123?utm_term=is+the+mortal+instruments+a+movie PDF link annotation
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/b901eef4454875.pdfIn PDF document text
    • https://fasexunatosupa.weebly.com/uploads/1/3/1/6/131606354/4143814.pdfIn PDF document text
    • https://lewumime.weebly.com/uploads/1/3/5/2/135297270/sazoxevupasorad.pdfIn PDF document text
    • http://domainlimax.xyz/tai_game_ban_ca_apknhho1.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/fa6f1a5a9e78c52.pdfIn PDF document text
    • https://cdn.sqhk.co/supibufuk/ij3tFgi/best_classic_ringtones_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/jjjfxgc/health_risks_space_flight.pdfIn PDF document text
    • https://manedubel.weebly.com/uploads/1/3/4/5/134587872/1e3133.pdfIn PDF document text
    • https://cdn.sqhk.co/wokiwife/igighhZ/nuwabimo.pdfIn PDF document text
    • http://photoforce.ru/217965251o3c1q.pdfIn PDF document text
    • http://rusherx.studio/58235050341hwq2r.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/8168303.pdfIn PDF document text
    • https://sifegofariwe.weebly.com/uploads/1/3/1/4/131437131/9304975.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/gfBihib/new_school_term_pretty_girl_names.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/fejatepudopito/langman_s_medical_embryology_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/84996711909.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/yahoo_mail_for_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/47855111404.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_off0001448c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448C 4920 bytes
SHA-256: 5b7bc6445e00cb600b4f10e52b0f485fd3fb6d092f60b19a5163eb43cbafdc87
font_01_sfnt_off0001551b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1551B 12480 bytes
SHA-256: 1364f1831157105e06e276bdd199015309b8a38d981350f1f107312c678631be

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