Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f12c30fc730df60…

MALICIOUS

PDF

77.5 KB Created: 2021-06-08 12:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f1b82258b9ca65a3f471529558455138 SHA-1: 6ca6c25d12b5daad03511fb7f65230e707922855 SHA-256: 4f12c30fc730df60321f50583db4ba9a9ad16b179e68bd9d279efc2435f81a75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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 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=anubhavinchu+raja+audio+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379854/normal_6018482b2f153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_5fdad2c6261b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/230afccf-e8d4-4104-bfe5-62135850a51f/pumefekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a342f1-3cc5-4f9b-8160-b04b125ba636/autopsy_report_online.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/w/file/fetch/144796377/what_does_class_rank_reporting_mean.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/23187220359.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/22927016559.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/what_are_the_characteristics_of_traditional_economy.pdfIn PDF document text
    • http://tefesabiji.pbworks.com/w/file/fetch/144867528/moverudasafuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d8ad0f-c15f-4240-80f2-64d4d4115ecc/suzuki_violin_school_volume_6_piano_accompaniment.pdfIn PDF document text
    • http://temopifevup.pbworks.com/w/file/fetch/144797772/problemas_razonados_de_sexto_grado_de_primaria.pdfIn PDF document text
    • http://zuxanuj.pbworks.com/w/file/fetch/144790869/gta_san_andreas_mod_menu_steam.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144769026/surewumoxafo.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/w/file/fetch/144535650/dil_hai_tumhara_film_song_lyrics.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/f/harry_potter_google_drive_indonesia.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144424359/pokemon_planet_free_money_hack.pdfIn PDF document text
    • http://muxapoxowo.pbworks.com/w/file/fetch/144644691/qayamat_qayamat_mp3_song_download_likewap.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/tolizoxuvowina.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/naxezifudikupenozimujaf.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_off0000f2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EA 5436 bytes
SHA-256: 056a0c501ce26f140f6498e326d500b477ea59c8a8eed86a901b69fa0cff6ad5
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 10840 bytes
SHA-256: 300ee4492c0076b298d12f8fafa395d09b0a7b783829a62d6a1ca59ec549b036

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