Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d88e91ae9b7377e…

MALICIOUS

PDF

86.4 KB Created: 2021-03-29 11:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 325810f4e1bfdeb4e7c210442565d7f8 SHA-1: b1595d4a7775fede43a33fcdd6f81f3c24da3c35 SHA-256: 3d88e91ae9b7377e5fdd051491cdd45f85004ff8ff30078660920fb4b8c53edf
66 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to various domains, many of which are hosted on disposable or low-reputation platforms. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm, likely for SEO poisoning or to host malicious content. While no scripts were explicitly extracted, the presence of numerous external URIs suggests the document's primary purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 4

  • 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://kuzutuzo.ru/wix?keyword=snes9x+android+apk PDF link annotation
    • http://nezatarofarix.getenjoyment.net/zowenuxefikakogodunatapu.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/d6ea15f4ce.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/d235ea3d7284.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/estadistica_para_administracion_anderson.pdfIn PDF document text
    • http://govnososal.xyz/21295946744fjc65.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/6590104716.pdfIn PDF document text
    • http://xufuzema.sportsontheweb.net/bsc_part_2_chemistry_practical_book.pdfIn PDF document text
    • http://lulodexov.scienceontheweb.net/82893173888.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/aPhgjeQ/82713184.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/yjiNBha/abandoned_tramway_hollow_knight.pdfIn PDF document text
    • http://funseeds.site/csx_apps_mainframephwnm.pdfIn PDF document text
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/mesafo_kugufufojil_dapisiti_dagawedomewaku.pdfIn PDF document text
    • http://saudiautoinsurance.com/59080802259p9pwh.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/ig0pchd/fawuzu.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/68170701966.pdfIn PDF document text
    • https://cdn.sqhk.co/piwuzuberaze/iatrjho/goduv.pdfIn PDF document text
    • http://sluzhba1.net/bollinger_bands_formula4tm96.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/logitech_bluetooth_keyboard_number_pad_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/tifozeborot/egjFQ0V/idle_tanks_3d.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://ritumogadoj.onlinewebshop.net/simijapixilutom.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/38103583706.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/69021836619.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 5020 bytes
SHA-256: 2e7ff57f9adfdb409d0074f48fc770878710736e3693b3eefa7bed4312aec0a8
font_01_sfnt_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 3024 bytes
SHA-256: cf651e4e9ce28db43fee3d6e86be7c443a0e8e86ef4dd413e7cc88952d2a65ee
font_02_sfnt_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 12636 bytes
SHA-256: e0fde78e48fa38998413796ecc04beefb490acd842a2c9295c9c418cc7d0a73e
font_03_sfnt_off000126bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BF 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
font_04_sfnt_off00013b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B85 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230