Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bbe08d2c12f25c…

MALICIOUS

PDF

84.0 KB Created: 2021-02-22 22:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 187f8bd63590cc63d782460bdd14aeaa SHA-1: 73f281b3d57ca88985c25fb770800ea1b1930a01 SHA-256: b6bbe08d2c12f25cb971b6ed972d25554d11d5f38e43969be968e02f22152ebc
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=how+to+use+lux+1500+thermostat PDF link annotation
    • http://ecosbor.net/komo_4_traffic_reportadg6g.pdfIn PDF document text
    • http://vejexoxidinu.iblogger.org/xifokebijolimuzogow.pdfIn PDF document text
    • http://kopavavabigi.66ghz.com/ziwurabufidowiratenaxo.pdfIn PDF document text
    • http://max-lifting.store/free_editable_borders_for_word_documents_templates06de4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5ff2f0ce476da.pdfIn PDF document text
    • http://filanion.online/gram_staining_lab_report_observationsmtkav.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/3Cdhdzl/mubemevaxenunuwosid.pdfIn PDF document text
    • http://usacarins.com/best_fps_multiplayer_games_for_android_2019l0u85.pdfIn PDF document text
    • http://trokot-online.xyz/dunadifijozolekojjseri.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/investigative_reporting_meaning.pdfIn PDF document text
    • http://digerutejonoju.22web.org/purekuxepibagel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegefonupekowa.epizy.com/55696304260.pdfIn PDF document text
    • http://kajonefev.rf.gd/hp_photosmart_d110_driver_is_unavailable.pdfIn PDF document text
    • http://zejowupifodoj.rf.gd/suwebaxunanor.pdfIn PDF document text
    • http://neduweleviwov.rf.gd/how_to_use_fire_tv_remote_with_echo.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_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 5364 bytes
SHA-256: 4b43cc140b21087262488a6b484f0111435ac21047dd2ff69ca69f15ed9c1528
font_01_sfnt_off00011c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4A 10932 bytes
SHA-256: 4fb4d9620148547bfa3ff032c08da56cac19fc8c22669dbe1723404d394e4fc0

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