Malicious PDF — malware analysis report

Static analysis result for SHA-256 744e46af8dd5a709…

MALICIOUS

PDF

84.9 KB Created: 2021-06-10 14:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b5b6508114306647e8389527afd9b5f SHA-1: 5b35f720e38b505bdf3a5650c2a194fc04b063ec SHA-256: 744e46af8dd5a70989af20d5f78ed2ed80ca9ffbb676e4bce2e6dde837bcf11b
226 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. It uses a password-protected-archive lure. 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 0.9990

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ketchas.ru/pbw?utm_term=harry+potter+and+the+philosopher%2527s+stone+full+movie+hd+download PDF link annotation
    • https://lupofavegevo.weebly.com/uploads/1/3/5/3/135335207/8998f03f487064.pdfIn PDF document text
    • https://besivopu.weebly.com/uploads/1/3/4/7/134705308/ce2a92c5.pdfIn PDF document text
    • https://vizosajigu.weebly.com/uploads/1/3/1/3/131381839/783856e3e52e58.pdfIn PDF document text
    • https://mejawazur.weebly.com/uploads/1/3/4/2/134265830/8517347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_5fdb2d47aea2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491433/normal_5fdd76cd8fdb0.pdfIn PDF document text
    • https://satufikobupi.weebly.com/uploads/1/3/2/6/132695363/gomivelulorab-tixazile-vimixeserusavon-lovivejexovibo.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/8dcc6.pdfIn PDF document text
    • https://fapotuseji.weebly.com/uploads/1/3/4/7/134712372/1551132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426675/normal_5fe2b124d23f2.pdfIn PDF document text
    • https://vuledojovux.weebly.com/uploads/1/3/5/9/135962602/88009cbbf59dda.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/xijida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0683ae-2d76-4bd2-8cc0-2aa04b72f820/32874117955.pdfIn PDF document text
    • http://najajufuf.pbworks.com/f/miniature_dachshund_dapple_for_sale_near_me.pdfIn PDF document text
    • http://tokemomonu.pbworks.com/f/what_should_you_eat_if_you_have_barretts_esophagus.pdfIn PDF document text
    • http://wenitudodub.pbworks.com/f/how_to_register_fl_studio_12_with_reg_key.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/145046367/49209563027.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/download_monster_legends_mod_apk_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8132ba08-6ff2-4d3d-90bb-9c60ff000373/introduction_to_meteorology_textbook.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144414753/satyanarayana_swamy_vratham_pooja_in_telugu_free_download.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/mapa_hidrografico_del_mundo_para_imprimir.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144427107/android_oyun_club_clash_of_clans_hile_apk_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87efd90e-726b-4eca-af1e-ac3604977e32/61532226994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917b3b50-3ddc-4518-b228-4c982043f580/21533513520.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 5528 bytes
SHA-256: 1b932b1c7deaeeac689cc4518c3aa43e7c1f740a2972fb30a5b8f04b65c99eca
font_01_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 13800 bytes
SHA-256: ee05af79fb827af4cfe1a449a9587960e65ff18f70b8114d5fadf69a99098748
font_02_sfnt_off00012f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F68 16544 bytes
SHA-256: cbadf1f5f583e22ba9593fa37ba28054c83bfd697820d54c6c8e5e67a939b83f