Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea5ac9e1fb6c961…

MALICIOUS

PDF

73.6 KB Created: 2021-03-06 06:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a63aa3ca99332483dd6b5db1d91cc7b0 SHA-1: 8340843c95a4ae51fd8f90892b7915c00019ab08 SHA-256: aea5ac9e1fb6c961f415a8da562fd26d11e3c68ab4a87ec6998ad5f6781819bb
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, appears to be a lure related to expiration dates, likely to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=when+does+my+tracfone+expire In PDF document text
    • https://cdn.sqhk.co/rorazelesu/higEqih/93750841247.pdfIn PDF document text
    • http://jupizuginilumop.22web.org/jack_reacher_2012_full_movie_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/Ehj4ug5/75890001765.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/iIutId7/video_downloader_for_social_media.pdfIn PDF document text
    • http://guditoresuz.22web.org/fifigadikilip.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/Q914jhk/90686282256.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/jsijjil/party_puffle_stamp_club_penguin.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/6e344460-6689-43d1-b9ba-9f76c6a31aaf/how_to_draw_guy_anime_eyes.pdfIn PDF document text
    • http://kateporabub.epizy.com/richland_township_michigan_zoning_ordinance.pdfIn PDF document text
    • http://mujunuge.rf.gd/treasures_spelling_practice_book_grade_4_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b565c0-1ce8-4165-b054-3f59b22d1a1b/how_much_does_it_cost_to_install_a_rinnai_tankless_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2ecfd8-84cf-43c5-8541-af5a21dac884/jovolutolazijozuredatewit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b891a64-af39-4583-a70d-6e3b4fafc178/29762470988.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/android_studio_kotlin_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4bd79d-d4f7-4aad-91fc-b280c9709217/omron_plc_programming_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea5340f-2c4c-4671-9172-9a9a4aa423fd/how_to_do_fast_rap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bdb8566-a991-4ef0-957b-b4c75edbf00d/farmall_super_c_3_point_hitch_conversion.pdfIn PDF document text
    • http://duguteterexu.epizy.com/faxivomexuvemofulipe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/93046010235.pdfIn PDF document text
    • http://karababeso.rf.gd/fijakevud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acc29d8-ff42-4237-bc0d-47a1b19b2a88/kepugotudetot.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/57312290110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc10920-523d-4bf8-9a82-05750add6d90/vukadariroves.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_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 5544 bytes
SHA-256: 647883be72b61a5fd73f1346c76116780d6c88d37645fb5a04201fc6787f834c
font_01_sfnt_off0000f578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 10376 bytes
SHA-256: f597790b16986cc5d7c2672b91c088b36b4c9eb5871a34fc890fa08114357242