Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7f30f3ef93a5fe…

MALICIOUS

PDF

78.7 KB Created: 2021-05-10 19:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a50fd4f653824d68016d3f73cbea927 SHA-1: 05d161a293459c79214c64f4ad20ee6dc5e36c57 SHA-256: ee7f30f3ef93a5febd3b84a2ba55393a8f6573250ca97747b28bee99c5c25655
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a secondary payload. The presence of external URIs suggests an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=can+you+build+muscle+mass+with+a+bowflex
    • http://xurufotuzu.iblogger.org/format_factory_exe_file_free.pdf
    • http://kulibakux.iblogger.org/vmware_interview_questions_and_answers_2017.pdf
    • https://cdn.sqhk.co/ruwonumatag/hd8jjgi/my_sprint_rewards_me_login.pdf
    • http://vutanari.22web.org/hadith_bukhari.pdf
    • https://cdn.sqhk.co/lapefuxolu/VvRWO4Y/3d_crystal_puzzle_cinderella_castle.pdf
    • https://cdn.sqhk.co/guzoladip/zhji0hc/kakusonenofu.pdf
    • http://wiboratiraveguw.mygamesonline.org/anatomy_and_physiology_of_the_human_eye.pdf
    • https://cdn.sqhk.co/linidivez/jizjcZJ/release_plan_template_scrum.pdf
    • http://rerupebe.iblogger.org/family_medicine_journal.pdf
    • https://cdn.sqhk.co/xeviremal/ijafihc/2020_ford_raptor_truck_for_sale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_00af679c54b249239cd5c4c17c1a1a5c.pdf?index=true
    • https://115777a2-cc0e-4789-9e99-30cf4bdfca1a.filesusr.com/ugd/2b3546_de6b21ae72424e5f98aa5e21e432d676.pdf?index=true
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_8de1dce9439d4a5ca4b4d96912840381.pdf?index=true
    • http://posikin.myartsonline.com/the_adventures_of_sherlock_holmes_free.pdf
    • https://uploads.strikinglycdn.com/files/858ca7dc-99b1-41aa-b33c-66503a109027/waroguvujuxuvo.pdf
    • http://pexoroxijaseduj.rf.gd/55682011562.pdf
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_5d4f33710b514adfbf81ddae011cb4a3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/afcbc858-1a82-45ba-931c-df86427912ac/bright_line_eating_cooking.pdf
    • http://jezepanan.rf.gd/fejan.pdf
    • http://jejofasur.rf.gd/31001158187.pdf
    • https://uploads.strikinglycdn.com/files/c6a6c99c-9c17-4fbe-95ea-43c412d45374/latest_india_pakistan_border_news_in_hindi.pdf
    • http://nolumuj.epizy.com/the_compound_microscope_worksheet_answer_key.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f6.bin
e3c41888e66f5f385bda7e2f035ac9b7b83488b407809b90bd5a211b71306d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5472 bytes
font_01_sfnt_off00010889.bin
200f5109db1705d7633f9ba35e2dfb0612cf697c1272f8831ca4c8cfcb994ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 10876 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.