Malicious PDF — malware analysis report

Static analysis result for SHA-256 a375a45e2212ba2f…

MALICIOUS

PDF

88.1 KB Created: 2021-03-08 18:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c4d836a179130a6acf51725865689e8 SHA-1: d83f5fb4b92b597edc20065c4eab6d24bdf7adac SHA-256: a375a45e2212ba2fee94c0cb20d4b225893761e2029f9ccfb0305354ab5773a6
126 Risk Score

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 0.9996

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://zajinet.ru/strik?utm_term=davinci+resolve+speed+editor+tutorial PDF link annotation
    • http://dotekebenutedex.scienceontheweb.net/hot_tub_service_near_me.pdfIn PDF document text
    • http://shopee24.site/plant_structure_worksheet_high_school5mx6z.pdfIn PDF document text
    • http://yandex-delivery.cc/origen_y_evolucion_de_la_escriturambr6s.pdfIn PDF document text
    • http://hightrade.club/tableau_free_download_latest_versiong2d2f.pdfIn PDF document text
    • http://dkblogin-de.com/815304252368ppy3.pdfIn PDF document text
    • http://ketadiets.site/classical_conditioning_phobias_answer_keyn7omu.pdfIn PDF document text
    • http://cosmostil.top/42541197492755ok.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/kenneth_cole_watch_repair_near_me.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/81592661415.pdfIn PDF document text
    • http://dom-bita.org/343671583619r02d.pdfIn PDF document text
    • http://deemonatrafik.xyz/expert_secrets_ebook_downloadxzkox.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/situzoben-lugawum-filofizupuboke.pdfIn PDF document text
    • https://suwekamepegatir.weebly.com/uploads/1/3/2/6/132682685/mufunolopag_napekufore_nutuviv.pdfIn PDF document text
    • http://eeeeeyyy.space/merge_two_excel_spreadsheets_remove_duplicatesqpxzs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/gedulojufapivedijovif.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/livuno.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/what_is_the_best_vegetarian_meal.pdfIn PDF document text
    • http://ruludamena.epizy.com/29848520877.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/temiwagajo.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/800_thread_count_egyptian_cotton_sheets.pdfIn PDF document text
    • http://zimipasazodid.rf.gd/how_long_does_it_take_to_microwave_a_sweet_potato.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/childrens_story_books_free_download.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_off00011c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C00 5128 bytes
SHA-256: 07b6737f199acc8eb9f2062fece0eb65605d53b998d84d3c635cafaf39929224
font_01_sfnt_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 11032 bytes
SHA-256: 456f26b2b9a462faadebcff2574b76ba5cc145f6e0e79364470f6fe5013263db

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