Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec7f26dec5683b7…

MALICIOUS

PDF

79.0 KB Created: 2021-03-03 03:11:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16d5908779bbbfd64f6cbc65d358b236 SHA-1: afa2a512a0b13e059b0d84ad9aea278e786dfc07 SHA-256: 9ec7f26dec5683b7b0d6eca22d4bec4044d886848233b26c4e0135cebd741050
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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://kuzutuzo.ru/wix?keyword=pogo+big+city+adventure+answers+google PDF link annotation
    • http://hd-cam-mirror-up1.club/80832834135kius.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/4370004.pdfIn PDF document text
    • http://mizusugazalu.22web.org/dodepivoxijifanabukala.pdfIn PDF document text
    • http://familyit.info/fepevefalibirutawetufaj4ca.pdfIn PDF document text
    • http://jusafajilejeg.22web.org/45801952589.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/cost_of_living_index_by_state_2020.pdfIn PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/pesipixi.pdfIn PDF document text
    • http://biolinkus.me/85157967273g1m6s.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/why_does_my_circular_saw_keep_stopping.pdfIn PDF document text
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/4012745.pdfIn PDF document text
    • http://ashotik.space/bugupibesotajegexovezunz9o6.pdfIn PDF document text
    • http://punalat.22web.org/84964244206.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/GjdKBge/italian_inlaid_jewelry_music_boxes.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/zofawazunivixu.pdfIn PDF document text
    • https://fefefilax.weebly.com/uploads/1/3/2/7/132712664/buperutatoxugoki.pdfIn PDF document text
    • http://fiwazurenorin.iblogger.org/65186883405.pdfIn PDF document text
    • http://lakulikelanu.iblogger.org/home_against_medical_advice_sample_form.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/sgfZXhj/remarodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuduzukatej.epizy.com/linear_equations_and_their_graphs_worksheet_answers.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/where_is_the_wps_button_on_verizon_fios_router_mi424wr.pdfIn PDF document text
    • http://gafodix.myartsonline.com/49730462521.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/no_captcha_recaptcha_wordpress_contact_form_7.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_off0000ec36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 5500 bytes
SHA-256: 88cca2c68798d8d795c2b3447ecdeeaea4c5b82b46acdfe46d570210084da4c1
font_01_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 15268 bytes
SHA-256: 346134193b0fb02828dd7c877ac78672d22cf2b4f05381459bd6943db4fff237

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