Malicious PDF — malware analysis report

Static analysis result for SHA-256 5818a886d3c8c7db…

MALICIOUS

PDF

75.8 KB Created: 2021-05-04 13:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1484c225101e9a14f90c2afbd61bd1b7 SHA-1: 65c000a0c2e72a5e6ee6ae1c0acad64a09db9376 SHA-256: 5818a886d3c8c7db47d2928b521bb37501459439acb9129b8416219162ca777b
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://soxebez.ru/strik?utm_term=how+to+find+deed+restrictions+on+a+property', are used to lure victims to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=how+to+find+deed+restrictions+on+a+property PDF link annotation
    • https://cdn.sqhk.co/fepexeguma/eNyMngf/rush_hour_car_game_app.pdfIn PDF document text
    • http://adanakebap.org/rise_up_singinga9jj7.pdfIn PDF document text
    • https://cdn.sqhk.co/samidabaxik/nRfsLhd/pixel_coloring_pages.pdfIn PDF document text
    • http://hookup153.fun/67955119161h7gj1.pdfIn PDF document text
    • http://investmag.org/the_ransom_of_red_chief_commonlit_answersxgm32.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/d4jhgir/82823652194.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/8119152.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/FskmhgL/teximelovuvabogotifijiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/hffKSgi/best_music_ringtones.pdfIn PDF document text
    • https://jofovumilaj.weebly.com/uploads/1/3/2/6/132681264/1295515c.pdfIn PDF document text
    • http://skidki-day.site/aptitude_test_for_class_10wz7s4.pdfIn PDF document text
    • http://mishabelle.ru/fufusepizenudikesosemimmbzq4.pdfIn PDF document text
    • http://fujavexawagul.iblogger.org/59210063668.pdfIn PDF document text
    • http://cookwellbakewell.com/36654086390vc975.pdfIn PDF document text
    • http://namelesssouth.xyz/usa_online_shopping_websites_listeafj5.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/286ceb57-0a02-4bad-a619-77fe588254f9/83905099476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1a1014-104e-48f6-9468-977e771d052c/fexituxozinena.pdfIn PDF document text
    • http://numekup.epizy.com/tujor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b277f8a-3f7f-4575-a66c-8726a8efeb3f/zivadoli.pdfIn PDF document text
    • http://dagajevefud.epizy.com/perioperative_antithrombotic_management_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a409dc-eaab-44be-991e-1e27d842f7d4/60354591605.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_off0000ead7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD7 5272 bytes
SHA-256: f7cc4b646d3025b57e6f7762159288e552985013f7c6b2a4f7c8ff1c95626074
font_01_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 10604 bytes
SHA-256: 774914ddc71f0e72639c9221ec683327234a706835da6c2f760d021a704cba38

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