Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54ece84eece13e5…

MALICIOUS

PDF

86.8 KB Created: 2021-03-24 07:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ef9fd2fbff0ee0b4a286be06b9c87aef SHA-1: c8a340a0b2912b17cba1ee68a579001d4a12dda9 SHA-256: b54ece84eece13e52d844b80e4b068b8e8784637b5ad36922a7d217ada6a5241
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://xezojetit.ru/award?keyword=okhla+waste+to+energy+plant+pdf PDF link annotation
    • http://ag-management.space/rivewidatotirasiwcufx.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/63165816132.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/1784329.pdfIn PDF document text
    • https://manujemupofux.weebly.com/uploads/1/3/0/7/130738512/7405312.pdfIn PDF document text
    • http://sexedate69.site/bbc_cricket_theme_tune_freepjlew.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/idioms_worksheet_6.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/kelorinixedawunofemadizow.pdfIn PDF document text
    • https://lovilubavovujag.weebly.com/uploads/1/3/4/6/134664731/2673722.pdfIn PDF document text
    • http://winsl.space/16867486004ok081.pdfIn PDF document text
    • http://bopugafuwu.scienceontheweb.net/delta_scroll_saw_blades_40-540.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/solving_linear_equations_by_elimination_worksheet.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/2dade824-7f07-4d64-80be-3dbdb76fa413/43016850121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23eab4ee-ea65-4d62-9efb-2fce188d6f20/el_arte_de_la_seduccion_libro_gratis.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/apc_smart_x_1500_manual.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/kung_fu_panda_2_cast_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6045cc1-e59b-4505-9f77-28569d0b2b1c/chapter_5_test_form_2b_answers_algebra_2.pdfIn PDF document text
    • http://zosunofurokor.rf.gd/83767661618.pdfIn PDF document text
    • http://rikukevez.rf.gd/naxofawekosinozijibegesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc82292b-85d7-451f-99a4-2aa79a208abb/gijedodimegebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5933cfec-3c12-46a6-b798-ac738958ca28/battletech_heavy_metal_gameplay_pc.pdfIn PDF document text
    • http://leparitupoxow.onlinewebshop.net/android_tutorial_tutorials_point.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_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 5588 bytes
SHA-256: 36793ab65e38513e5645de7ac75c6e5f724140e9b16ceaa0fa15963d047c790b
font_01_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 11324 bytes
SHA-256: 6df604e3aa18d84aecb3931e2b24282147fe78af0e4bf275e58d671ed95c78d0
font_02_sfnt_off0001391a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1391A 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330