Malicious PDF — malware analysis report

Static analysis result for SHA-256 06404028c2246452…

MALICIOUS

PDF

93.4 KB Created: 2021-06-03 09:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f097cbd8ac2f8f7fbe84845ff37c3208 SHA-1: 52cecf8151657f967e5262419ed7586da34846b7 SHA-256: 06404028c224645202841b82460147b70acb9608426fba05ca39dee6444dfd82
134 Risk Score

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 0.9992

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://allytemp.ru/pbw?utm_term=how+to+install+gta+five+mods+on+ps4 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4375077/normal_60aff235d7920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414851/normal_5ffa2738374a1.pdfIn PDF document text
    • https://zabomefekezene.weebly.com/uploads/1/3/0/7/130740536/pufobafuxunawatu.pdfIn PDF document text
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/f11aa30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_6066a496cbec4.pdfIn PDF document text
    • https://gorixiboxizamo.weebly.com/uploads/1/3/4/5/134589430/2198818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471081/normal_5ffdf2b1e7f59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bovozajezo.pbworks.com/f/designation_of_authorized_representative_form_bcbs.pdfIn PDF document text
    • http://redejok.pbworks.com/f/3615893241.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144504060/78798683364.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/up_board_2020_time_table_class_12_download.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/vudubifewitilajazi.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144425892/microsoft_visual_c_2015_redistributable_package_x64_windows_8.1.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144529314/how_to_use_acrylic_paint_beginners.pdfIn PDF document text
    • http://subazim.pbworks.com/f/como_cambiar_el_termostato_de_un_boiler_de_paso.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/what_is_the_nutritional_value_of_fresh_beets.pdfIn PDF document text
    • http://kikipudojuzo.pbworks.com/w/file/fetch/144529671/empower_b1_intermediate_students_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30022bab-3a25-424a-b337-dd9e8b50b04c/61067421036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d12a167-dfa0-47da-86df-447db257a6c3/12892745710.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/zibefafubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f52a53-33de-4f34-a8da-5b5b5253c340/jefaxef.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001195b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195B 5252 bytes
SHA-256: a820346a84087d87d19d28d63e1b6bed4e1859fb771ad5bb77e5dfa265faee72
font_01_sfnt_off00012b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000133d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D0 10888 bytes
SHA-256: 850f6795841f6108dfa40fc3209dd220d2f80b8acbba3ca870983b5836bb23ac
font_03_sfnt_off0001593a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1593A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3