Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e70a61d46322f2f…

MALICIOUS

PDF

78.8 KB Created: 2021-03-15 16:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5eb9e409ff7adf6634c072e01f1cd035 SHA-1: 520b83b97a1f0385c63af95724d1b46795a238cc SHA-256: 9e70a61d46322f2fcb66c9545e45a2c2a9b12c15129192db157e18af8a0d13b3
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous embedded URLs, with one prominent URL pointing to 'jacksth.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'Globecom 2020 call for papers'. No scripts were extracted, but the presence of many external links indicates a high likelihood of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=globecom+2020+call+for+papers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5fd345e61bd30.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/how_to_take_off_kitchenaid_mixer_attachments.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_601689d84343f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_6026fafd8f8dc.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/longman_academic_writing_series_5_essays_to_research_papers_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5fd36ce7cf7fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452395/normal_5ff849c3ba02c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_60465fa83cdea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_603cced1c3783.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/does_walmart_carry_polaroid_film.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421048/normal_5fc70e36018b6.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/ffd01817-7cc6-4987-98ee-84b82056c470/jokodimaritamovida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef70113-f663-41b0-9fbb-eae1b52157a0/meade_autostar_suite_user_manual.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/92466487044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4305a7-d24c-4c87-9d32-89b4aac68d87/verizon_4g_lte_tablet_price.pdfIn PDF document text
    • http://visunes.myartsonline.com/we_gonna_party_like_its_your_birthday_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b998cccc-a253-4b8a-a547-11d43bf441a6/72136933949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6b8d69-dfe7-4b9c-838b-5eaf2fa8a884/armour_of_god_song_lds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d87310f-d8a8-4570-9aa4-711c830d76c5/schaums_outlines_statistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363aad86-0ae8-48bd-a04b-8ed020b253d4/honeywell_m7240_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bd2bba-d6a5-4106-9562-485f12acaba8/la_crosse_radio_controlled_clock_manual.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/harry_potter_books_chronological_list.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_off0000f307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF307 5604 bytes
SHA-256: f895e70df1796571ee4d61deea9470ae18727e6567b11b2cb652aa0c793526f3
font_01_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 12400 bytes
SHA-256: f0c7360ee93ed4b1251a859ec344b4b347ea4c0a1beea9444d7c0ee2fc6c65e1