Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec00a8e32eb84dd…

MALICIOUS

PDF

76.2 KB Created: 2021-02-21 19:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cdf42dc4dad13571f56877e169a9a4e8 SHA-1: 68c05edaddd30e2eb242f958afc1aaefe3e8d583 SHA-256: 7ec00a8e32eb84ddd1084017606ed3c47b96527d13c6951e98962a884e7826cf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malware or facilitate phishing. The presence of a URL with a 'utm_term' parameter related to a movie download further supports the lure-based attack pattern.

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://druttle.ru/123?utm_term=the+maze+runner+2+free+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446380/normal_601eedf47423b.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/1a4304c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fe519434755b.pdfIn PDF document text
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/fubuf.pdfIn PDF document text
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/ba5bfdbe26b240.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/cjbZ2ia/samurai_wars_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/w9mieMu/cat_run_game_online.pdfIn PDF document text
    • https://namekabesomi.weebly.com/uploads/1/3/4/6/134668803/1717431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_5fd1a6aa665de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5ff4d0b044252.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/gadufifepitabemivila.pdfIn PDF document text
    • http://lunotikipadul.66ghz.com/botufilawarizure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_6014afb395532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kazaxese.epizy.com/aprendizajes_clave_primaria_2018.pdfIn PDF document text
    • http://tirinito.epizy.com/25126530380.pdfIn PDF document text
    • http://talizojewebovob.rf.gd/anbae_per_anbae_song_ringtone_free.pdfIn PDF document text
    • http://veruzixiki.rf.gd/50746130021.pdfIn PDF document text
    • http://junimufik.epizy.com/4712461441.pdfIn PDF document text
    • http://vasetirepevomeg.rf.gd/jegowi.pdfIn PDF document text
    • http://tupusivamiguta.rf.gd/arioso_bach_flute_sheet_music.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_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 5020 bytes
SHA-256: 02e83d24c957d670b3330ab135b0ad403065822f21a00adfa35407acca53cc4c
font_01_sfnt_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 11064 bytes
SHA-256: c8be0bb0de7a280c5ad17c1e57dad2f071acefc92e5275f3b2cc18a8bea4ddb9

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