Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3026923a25c774…

MALICIOUS

PDF

86.2 KB Created: 2021-03-17 12:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e95a4750b69217950903c433cfac72f0 SHA-1: 28a34960be125f75d55b2ef6042bab19266082de SHA-256: 1a3026923a25c7742465581a9e467e30203d61e311b94ee2707f35c1c936ed81
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an effort to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to real estate licensing, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=what+do+you+need+for+real+estate+license PDF link annotation
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/bepijab_sosenilisiraz.pdfIn PDF document text
    • https://tigobatimomovo.weebly.com/uploads/1/3/2/7/132740361/5ceb1e0.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/c4ieagj/bubble_bobble_world_game_free_download_full_version.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/sims_3_pets_free_download_mac_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/hicRCje/27702307628.pdfIn PDF document text
    • http://paruxezogu.mygamesonline.org/canon_mg2520_printer_scanner.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/1923285559.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/yy50qt-6_wont_start.pdfIn PDF document text
    • https://kawuzuvom.weebly.com/uploads/1/3/1/3/131379118/9336952.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/hhijOFa/27834155294.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/Jjbgf7U/ookla_speed_test_app.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/ludugafovebewif.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/cLiiCjd/recharge_my_airtel_dth_account.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/badavobate.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/the_monkey_king_2_release_date_in_india_in_hindi.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/what_is_the_meaning_of_mi_alma.pdfIn PDF document text
    • http://pigutun.myartsonline.com/xusodipesokawesav.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_4f96df6317be4ad7bdb9a6d4198f7783.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_9872bc20664f4d418dbcc35ad6759697.pdf?index=trueIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_b078c600e80c40c6a86da6256f4f5f77.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_7485c8d389c24379b29ebec0af497d29.pdf?index=trueIn PDF document text
    • http://pedirite.onlinewebshop.net/permutations_and_combinations_maze_worksheet_answers.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/30917345595.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_e7b93b6a65344716aa3be80d22a655b8.pdf?index=trueIn 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_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 5224 bytes
SHA-256: 7caa1bcecb3d5cf487bd72cc0b5130df2f9d8f9207ac644a17f58a89c613890b
font_01_sfnt_off00012496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12496 11336 bytes
SHA-256: df82085f7791decf5f2e62baeb2716aa55232d7df1fa2618343ece6af9f1096c