Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfad1be32ecfdbdd…

MALICIOUS

PDF

82.0 KB Created: 2021-03-22 11:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 80ad94ed03c4be3e5abdf63c624d6d48 SHA-1: b90e9172e66ab04b761a47c068f4326fbf5f24ec SHA-256: cfad1be32ecfdbdd1028884c8eb86fb3ba35037a12d73228dbdc60b580fee2ca
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 0.9994

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://kuzutuzo.ru/award?keyword=wordly+wise+3000+book+6+lesson+10+answer+key+pdf PDF link annotation
    • http://prizinsta365.online/honda_goldwing_gl1500_repair_manual5y3e5.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/kujaziwuz.pdfIn PDF document text
    • http://wanezus.scienceontheweb.net/attract_woman.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/hampton_bay_window_air_conditioner_not_cooling.pdfIn PDF document text
    • http://meetchat.space/spherical_harmonics_lighting284u0.pdfIn PDF document text
    • http://getveran.site/5_ejemplos_de_estilo_directo_e_indirecto81x84.pdfIn PDF document text
    • http://biggymstoe.com/jasuvesaw366w8.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/8946247291.pdfIn PDF document text
    • http://natikolom.site/char_broil_tru_infrared_4_burner_partsw09fo.pdfIn PDF document text
    • http://rovosome.22web.org/35685974262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/33968906935.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_f284b1e0d58042459ef85d364bf9af9b.pdf?index=trueIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/ritugadosofis.pdfIn PDF document text
    • http://tereralubo.epizy.com/how_to_reset_dsc_security_system.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_fbed3880d3ea420ab868dc7c1c9e6537.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ccf25f-9686-43f9-acf2-1be481bf9257/lapenipesevopajas.pdfIn PDF document text
    • http://zixadadafupeg.epizy.com/relative_clauses_rewrite_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8a290c-4fd7-49dd-bc01-10611c353f60/fifopevogurusudutiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa9de7d-c564-4931-beab-94ba21360d06/liweruxek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521b7c62-576c-4c4a-890a-b9cedb738635/chemistry_periodic_trends_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc44733-8b06-4fd8-a471-1cddb45a53d9/laguardia_academic_calendar_2018.pdfIn PDF document text
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_c9baeb6cc7d1440c9e71cb396ca45389.pdf?index=trueIn PDF document text
    • http://sulonofanez.rf.gd/android_messages_update_colors.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 5956 bytes
SHA-256: 4d2d6c9521d1c4960b161202c2e6fec816da2823e77c6b4c705cace03be5c58e
font_01_sfnt_off00010d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D82 13424 bytes
SHA-256: 04a801fe44a624108632227dcf9e266e67ddef024613fa2c2e0ff75aaa565ef4

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