Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9a5148fc5700ec…

MALICIOUS

PDF

71.7 KB Created: 2021-03-25 03:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2881cb9009b1040f742c69ddd82c551c SHA-1: 1e2b6bb40b1a2f4e0bab0c93d7668bcb3bb7d089 SHA-256: 3f9a5148fc5700ecf7ed180434c3b17de500a015da0c7e98cdd48449976fe285
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body and embedded URLs suggest a lure related to a "1024 genie pro manual", directing users to a link farm designed to obscure the ultimate malicious destination. The presence of multiple external URIs and a link farm heuristic points to a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=1024+genie+pro+manual PDF link annotation
    • https://cdn.sqhk.co/vixemujomu/eGj57Yl/83305233821.pdfIn PDF document text
    • http://savadaqwe.space/nefadawulipunoduruva6su1q.pdfIn PDF document text
    • http://santand-es.com/how_to_program_genie_garage_door_opener_in_cardck3l.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/jeidhbW/49806175655.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hcgfcpU/lugefilobokugatuju.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/giredi.pdfIn PDF document text
    • http://remontlegko.info/mijofarorufibix4nwg.pdfIn PDF document text
    • http://skidki-day.site/how_to_make_a_toga_with_bed_sheets1g9fy.pdfIn PDF document text
    • http://creditscorecard.info/romeo_and_juliet_act_1_scene_4-5_summaryjjxx6.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/ygiXjhf/cricket_australia_live_scores_big_bash.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/a5ieQjb/fokemuxifakixavali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokarodefi.onlinewebshop.net/lowoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27d2e96-9681-49de-854e-cc81443317f8/fifoxeketero.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/mga_halimbawa_ng_adyenda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b597450-47f6-47b8-8fd0-5f027e6c0896/wisilimapabuxinebaxurux.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/kemakozuj.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/c_programming_language_bangla_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64dec7a-7639-4121-8b7f-38c5ff55943a/diary_of_an_oxygen_thief_free_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b904818e-cf7c-4884-9d78-35482d5a661d/construction_safety_plan_template.pdfIn PDF document text
    • http://merapenerabari.myartsonline.com/caballo_de_troya_tomo_1.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/canoscan_lide_100_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd50736-293b-4ca2-8120-f2f90e718a9d/39817466150.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/caste_certificate_application_form_jharkhand.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/54642978975.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_off0000d8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DD 5280 bytes
SHA-256: f2ac0e8e8d79e29cb98aac8eff1df9e9ee5e60371ddc7675571259ac62996c32
font_01_sfnt_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 11072 bytes
SHA-256: 29289b51a212bd4c5b67226b0b13b05f237f50a76740755f645bee949182b00a