Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d3ff5a34ec22b7…

MALICIOUS

PDF

73.0 KB Created: 2021-03-27 10:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 12c7b6fafd879d0501552731614d2f8a SHA-1: fb7125ccbe9aa02b3c416e46553f0ac1f10efb3d SHA-256: 13d3ff5a34ec22b7ef29307ba57db9654a6319a7e37421a525b03b1230a027fd
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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/strik?utm_term=windows+server+2012+r2+iso+download+32+bit PDF link annotation
    • https://cdn.sqhk.co/wapadofiwe/84JBSAo/n._o._v._a_legacy_4._1._1.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/turtle_beach_stealth_500x_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/gdJLB8Z/teachers_union_demands_to_go_back_to_school.pdfIn PDF document text
    • http://zatoboyvibor.fun/80942341178ewevk.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/jIjcRkf/gikokazetumobuxuxoxer.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/bpsc_syllabus_in_english_2020.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/62588040779.pdfIn PDF document text
    • http://bisewilorilamej.sportsontheweb.net/aprendizaje_autonomo.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/bggrgiA/7557864994.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/idOgfBI/85855591615.pdfIn PDF document text
    • http://shmelev.pro/samsung_galaxy_tab_4_7.0_price_in_nigerianwcmp.pdfIn PDF document text
    • http://profyhouse.ru/confidence_fitness_treadmill_maintenance30eba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijipola.onlinewebshop.net/applied_operation_research_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25adb25a-e1d5-4b26-a806-6874c10d679b/best_garage_door_opener_with_wifi_and_battery_backup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be5e191-5eef-41fe-b877-5296e202aeb4/arabian_nights_movie_1999.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/chemistry_dimensional_analysis_worksheet_1_answers.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/55546104962.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/japeviwesawajexitamo.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/which_food_dishes_are_popular_in_south_india.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/38178342425.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_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 5616 bytes
SHA-256: ff5f0a4173242ed14960ff502465a70dd5c82a85bcb0c570b960301d14c4659c
font_01_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 10792 bytes
SHA-256: 5b28fb3a005d16629654ba950d17cdf079a764484932dcbcc4073b199bf8e402

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