Malicious PDF — malware analysis report

Static analysis result for SHA-256 549c1934827726ee…

MALICIOUS

PDF

102.4 KB Created: 2021-03-10 17:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9dd47cf65b5dab505bb533d69770116e SHA-1: e16a92efe444f09f5e029c319f546e565e0e6969 SHA-256: 549c1934827726ee026e975c4244f88cddcd1b240fcc5e64418632775df463ca
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The PDF structure and embedded content indicate an attempt to disguise malicious links within seemingly legitimate or search-result-like content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://kuzutuzo.ru/strik?utm_term=friedrich+nietzsche+god+is+dead+poem PDF link annotation
    • http://microbladingeyebrowsdallastx.com/how_to_open_the_graco_pack_n_playavpo8.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/gupurovazoge.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/ramizusonaf.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/tamew.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/eVbDgjv/vumojo.pdfIn PDF document text
    • https://cdn.sqhk.co/mukutosi/l61Jigf/the_banner_saga_wikipedia.pdfIn PDF document text
    • http://fullhp.info/rebojicaecb.pdfIn PDF document text
    • http://nuverlites.online/centroid_theorem_worksheet17wud.pdfIn PDF document text
    • http://wonder-ita.space/pekovijunegumignrtg.pdfIn PDF document text
    • http://tryici.xyz/what_is_gods_spiritual_lawc5nue.pdfIn PDF document text
    • http://discovljzg.fun/wamavexirufezotiwudakqbsq6.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/eieOzgf/marissa_mayer_resume_template_word.pdfIn PDF document text
    • http://znohist.site/insta_followers_free_apk1ft5w.pdfIn PDF document text
    • http://rineset.xyz/quran_in_english_application_download7fawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_024b6e274a6c4b07a43bee5447f0058e.pdf?index=trueIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_2cd77d80f1c944aeb4dd13ffa89bf724.pdf?index=trueIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_53971f4139df4f159899fc8dcc775089.pdf?index=trueIn PDF document text
    • http://kipejefanowisu.atwebpages.com/buwimudetoxiberamu.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_dbcbb30a2a7e4f899ba776a8e71e62e1.pdf?index=trueIn PDF document text
    • http://ginowane.onlinewebshop.net/xanezitodiwepigirujuweros.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_8f53259e2a5b41cd898b88644dab58f4.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_a39adbb3409d4eaaa2a44181f56c10c7.pdf?index=trueIn 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_off0001520f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520F 5460 bytes
SHA-256: 8836b10e1fb4dbe93bc4581f6974015a5b87597a94bfd780146f70d115b0c888
font_01_sfnt_off00016485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16485 12192 bytes
SHA-256: 87d35827cbf7fd47d6427907a2cff29421dfec0a8fb63f52ca64712e4fdfd80a

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