Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6f91379600eb01…

MALICIOUS

PDF

70.2 KB Created: 2021-03-01 20:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d8cfaee73f9bb2e9cc9924d2393463bc SHA-1: 8e83b76ed81e8dc88c3fed8700fefd856a808221 SHA-256: ed6f91379600eb013df505e4f7b698ed13e222a87c4baf275ce17896390a4d55
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the ML classification strongly suggest this PDF is part of a phishing or malware distribution campaign.

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://soxebez.ru/wb?keyword=maya%20banks%20books%20colters%20series PDF link annotation
    • http://puvepum.getenjoyment.net/xazuzoxasotijixekijabuvir.pdfIn PDF document text
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/porerevetiti_jatosute_suvabenam_wimoxijarufusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497078/normal_5ffaef1fb0b9b.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/sivezekugupuvaxadafi6r66p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_602c557684fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_603d2b4737d58.pdfIn PDF document text
    • http://ukranews.site/24533715490xcwjo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_602589888beb3.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/40704494454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_5fefdb6991f98.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/xeroribop.pdfIn PDF document text
    • http://mainsale.info/encounters_in_avernus2ir17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/17739145775.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/the_chronicles_of_narnia_cast_then_and_now.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/best_used_trucks_under_5_000.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17D 5104 bytes
SHA-256: a50b06eff08d7f8a6b63937445f3ea1ee305d31a73c31e80990d2c8be649f935
font_01_sfnt_off0000d300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD300 10520 bytes
SHA-256: 2eb4921e7416d94d8e792990c03ff4c25c028478a5ecb2dde81ca9ce96ace5cc
font_02_sfnt_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 16076 bytes
SHA-256: 0aba5c881c93ee4949f91d0ee0a4b83bcdba254ca43a0a0995787a457b61a3d2

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