Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0ae49ae0d93d85…

MALICIOUS

PDF

74.9 KB Created: 2021-02-28 05:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c2638cff2895d5379f3c40cf02dcf45d SHA-1: 2bcf48bbfb4db449f745a7d2fce01aea31cc07d9 SHA-256: fb0ae49ae0d93d85da75720c58eafbcb89d21d4f9d46465b27cbdd5218b8205c
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

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://druttle.ru/aws?utm_term=united+states+navy+recruiting+command+logo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385424/normal_601de39b48923.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/4935454947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5ff5a4f0d0ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_602d729ab26e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fcd58da1fd79.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/f7Ggjgj/galinanekogovite.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jji5jeq/davazewogawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_602c95f3049e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novabimakokoj.rf.gd/ejercicios_resueltos_de_movimiento_caida_libre.pdfIn PDF document text
    • http://vujomigokije.rf.gd/java_jdk_64_bit_linux.pdfIn PDF document text
    • http://fikirifulok.epizy.com/parametric_to_rectangular_form_calculator.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/jufekuvarevakawatig.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/32013506964.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/verogorepinobu.pdfIn PDF document text
    • http://navasegekukuj.epizy.com/classical_music_app_free.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/46652641007.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/60678801352.pdfIn PDF document text
    • http://zoxutudirufusoj.epizy.com/can_you_freeze_panes_in_google_sheets.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_off0000e8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AC 5412 bytes
SHA-256: abc75dc9ab1944b78f597515c859cd0ba38754db01f7f1cdb00055eb338e99ac
font_01_sfnt_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 10536 bytes
SHA-256: a995385c5718dc578e45e36712306442467c894a5e852ceb1d774809b9fe00d8

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