Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b2db325e328f2b…

MALICIOUS

PDF

73.9 KB Created: 2021-03-27 23:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 778006088d385138e84238f5945d115b SHA-1: 42e0e304f5948b297adc6a53963f656808db1b45 SHA-256: f2b2db325e328f2b0bb8b7ff967de02758f11815e47827ad01b11b57fc349c44
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS, along with a critical ClamAV detection. The embedded URLs, such as https://golowaki.ru/123?utm_term=printable+calendar+august+2018+pdf and http://zupedaganivo.66ghz.com/1802892982.pdf, are likely used to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to a printable calendar.

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://golowaki.ru/123?utm_term=printable+calendar+august+2018+pdf PDF link annotation
    • http://zupedaganivo.66ghz.com/1802892982.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/Ljfgfhi/extreme_moto_racer_3d_apk_indir.pdfIn PDF document text
    • http://fugoverud.iblogger.org/bypass_mega_limit_megaer.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/9tIghd1/trivia_crack_2_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/jedetanepiz/fQkhge9/delonghi_espresso_machine_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/Vd7gcy0/tasks_todo_list_task_list_reminder_pro_apk.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/xameberarili.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/chc1gcK/mermaids_in_haiti_2020.pdfIn PDF document text
    • http://pimipaxu.22web.org/cahier_de_vacances_francais_4eme.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/ggrjbgi/xafesuxijejejowa.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/9hDj3mo/dea_kiki_camarena_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guxedin.rf.gd/23747853584.pdfIn PDF document text
    • http://nesijitazesino.epizy.com/how_long_is_navy_sere_training.pdfIn PDF document text
    • http://bupuvesonema.epizy.com/catholic_bible_telugu.pdfIn PDF document text
    • http://vakalugofiw.rf.gd/power_pressure_cooker_xl_red_potatoes.pdfIn PDF document text
    • http://bokatevifelu.epizy.com/chuyn_sang_nh_trn_my_tnh.pdfIn PDF document text
    • http://xomedejufe.rf.gd/82151469273.pdfIn PDF document text
    • http://vawoxifi.epizy.com/wugedanodaxa.pdfIn PDF document text
    • http://jusolasoxo.epizy.com/massey_ferguson_3545_parts.pdfIn PDF document text
    • http://lobowubuzo.epizy.com/61197090983.pdfIn PDF document text
    • http://najorenowodume.epizy.com/cinema_4d_free_trial.pdfIn PDF document text
    • http://nibewisule.epizy.com/eclipse_remove_bookmark_shortcut.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 5984 bytes
SHA-256: 40c91a1960bd679c3b4742354c82a7c00a375f21bb9f99b43bdc00487feeb7a1
font_01_sfnt_off0000f5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F1 11160 bytes
SHA-256: 0b71207c7aa409e94c212c59c155ca826dc671039ae15756854a09a67d685c13

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