Malicious PDF — malware analysis report

Static analysis result for SHA-256 10cabc64f3b91548…

MALICIOUS

PDF

74.0 KB Created: 2021-02-18 23:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f0a85d22f8fcc5ead1cfbf79e72508e7 SHA-1: 313ade1db989a6f06ecbffdfee6b1e6f7dbc592e SHA-256: 10cabc64f3b9154848f1e308121f7a19db7154296bb6d7751f810f8722a87a20
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable hosting or known malicious redirectors, indicating it's part of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=noco+genius+g3500uk+battery+charger In PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/warelexudox.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/gINmha6/zegib.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/ghYgcjb/lador.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/jdSjjbM/safidolitutibefafib.pdfIn PDF document text
    • http://cloudmarket.website/five_minute_journal_templatejb3wn.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/galaxy_s8_active_at_t_firmwaremfnix.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/zEhid3B/crossroads_mall_theater_waterloo_iowa.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/hZCnibN/temipefo.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/nobovixi_nilipabovas_kiwuvikaton_lonaro.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/10jhfhf/nm_all_star_football_game_2019_roster.pdfIn PDF document text
    • http://jakor.pro/78707642582n2x8t.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/Ohbrhjb/tozefegopexedukexukuka.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/USCyria/vodafapebetag.pdfIn PDF document text
    • https://cdn.sqhk.co/puzokopu/j7hfgfm/rezizexuwajuvapexugafixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://woduzubede.epizy.com/78939080048.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/bahubali_movie_tamilrockers._net.pdfIn PDF document text
    • http://gonaviniji.epizy.com/339946661.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F7 5616 bytes
SHA-256: b0cf2d96aab7ad0893904d3e1d61367a9f1e0c3f3b589c6c2eee555e9463c9d7
font_01_sfnt_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 10628 bytes
SHA-256: 5ca356e9c9153954b9e485ab439a655866743a420c461389a8675ed761389ff6
font_02_sfnt_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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