Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ca54e465700a61…

MALICIOUS

PDF

79.3 KB Created: 2021-05-31 22:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f1c13a6c5141092fb5211d7c616c8ea9 SHA-1: 72dd33891f7632935bef5a8973412499cd1d7ea3 SHA-256: 53ca54e465700a618c7c502a8200cad6452ea2b3f0b42e3bcf66474b8c7235a2
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/123?utm_term=football+live+tv+app+android PDF link annotation
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/sikisatakot_zejonunanulewe.pdfIn PDF document text
    • https://sojisesoto.weebly.com/uploads/1/3/1/4/131437607/4ffcd460e2c2.pdfIn PDF document text
    • https://naworetomepixi.weebly.com/uploads/1/3/7/5/137504938/nevusefimov.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/3f30ce6d.pdfIn PDF document text
    • https://zuginapox.weebly.com/uploads/1/3/2/6/132695273/roselumijisuwopel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiletejude.pbworks.com/f/libros_de_harry_potter_originales_en_espaolo.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144424347/37003883889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610eff41-ce6d-483a-85af-61b746e5fd9c/rezultate_bacalaureat_2015_suceava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014e328c-aa56-43c9-9c7f-6223fe5ebadc/how_do_i_reset_my_gate_remote.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/bypass_frp_samsung_s6_edge_plus_android_7.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/lafavebapomawuvevakatepo.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/f/pros_and_cons_of_tax_relief.pdfIn PDF document text
    • http://dejimebez.pbworks.com/w/file/fetch/144420729/the_complete_interview_answer_guide_download.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/short_book_review_of_treasure_island.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/nova_escola_de_linguas_maputo_mozambique.pdfIn PDF document text
    • http://xawaren.pbworks.com/f/ferivatagurova.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/witefexazokexugiwesevel.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/1176114755.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/85388950070.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/soneridip.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 4928 bytes
SHA-256: a1fecdc0843b87fb57977fbd2c0d3f6d838581954d4f90d3b6cf9f13472f9a74
font_01_sfnt_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 10296 bytes
SHA-256: 0315249fae43c344128256e325261f609dff389b5a0486b3667800a76720d1c0

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