Malicious PDF — malware analysis report

Static analysis result for SHA-256 befef5be64f75a0e…

MALICIOUS

PDF

74.9 KB Created: 2021-04-02 11:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e0e2d91fe1048a7726dc610f22a12721 SHA-1: 0b1055c0422282a027f0d61493ab2402c87f5fbb SHA-256: befef5be64f75a0e7ec070884b95e5b51b99a830a15814a6c1234cdc87133ee5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a phishing lure related to a "spammable moonkin form macro". The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or further exploitation. No scripts were extracted, but the PDF structure and embedded URIs suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=spammable+moonkin+form+macro PDF link annotation
    • http://sujimelowakolop.medianewsonline.com/pibujujibixap.pdfIn PDF document text
    • http://pevisokis.iblogger.org/panasonic_dect_6.0_phone_replacement_battery_hhr4dpa4b.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/jghhihj/flights_to_florida_from_detroit_delta.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/medical_certificate_for_leave_from_doctor.pdfIn PDF document text
    • http://nakapugevonisu.iblogger.org/what_does_the_ending_of_akira_mean.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/hp_officejet_5510_specs.pdfIn PDF document text
    • http://kibidusivojigo.iblogger.org/300_logical_fallacies.pdfIn PDF document text
    • https://cdn.sqhk.co/xetajikok/lIURjgQ/98461937442.pdfIn PDF document text
    • http://xevokegejir.iblogger.org/98198257267.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/basaforuxigidegoxome.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/sowewazulejewi/gajixatebabexusezisob.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/waruxexumanumotovisexezek.pdfIn PDF document text
    • http://nugafafekovad.epizy.com/birisetavaxi.pdfIn PDF document text
    • http://ragobubobog.rf.gd/57876006121.pdfIn PDF document text
    • http://vagasobewinepu.rf.gd/dell_optiplex_3010_i5_3470_motherboard.pdfIn PDF document text
    • http://monawob.epizy.com/best_algorithm_book.pdfIn PDF document text
    • http://womawujun.atwebpages.com/41231003719.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/26210286929.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/vugaforibigelepej.pdfIn PDF document text
    • http://vulafaxenoza.epizy.com/activator_appliance.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/bosch_security_camera_software.pdfIn PDF document text
    • http://mudanogepiw.epizy.com/xinogugesozaka.pdfIn PDF document text
    • http://tekisinasapev.epizy.com/criminal_law_uol.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/97863584618.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_off0000e56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56E 5288 bytes
SHA-256: 8769c5d37033d8abec4e5553e3a90286570c26b2f572ac8218900fa8b240fc5f
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 11384 bytes
SHA-256: c267f0a29a05bfbca4fbb4a7b7db633cb66262895ef25caf7d4ee5489904f4a6

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