Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea707148722c99e4…

MALICIOUS

PDF

96.4 KB Created: 2021-03-27 16:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e573d6edbc30f4cefffea1aedfca6c75 SHA-1: 9878d497dff4f6939a71520386b91763a7376809 SHA-256: ea707148722c99e4fbc03dd194e231c9ff3e30c493e7a64547c5a0432c067499
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to 'psychiatric disorders management pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/award?keyword=psychiatric+disorders+management+pdf PDF link annotation
    • http://nonly.xyz/lolalerko4dr.pdfIn PDF document text
    • http://pankreatitum.ru/ginovpw3fp.pdfIn PDF document text
    • http://abreudesigns.com/8866708603anz5j.pdfIn PDF document text
    • http://magnitoli-2ekran.site/marketing_campaign_brief_template_wordfam19.pdfIn PDF document text
    • http://setopin.mypressonline.com/accounting_techniques.pdfIn PDF document text
    • http://sis-paypal.com/born_to_be_wild_chordsr78c6.pdfIn PDF document text
    • http://datab.vip/tagefubxfrjq.pdfIn PDF document text
    • http://vemusopudin.22web.org/libros_de_administracion_turistica_y_hotelera.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/coping_cat_workbook_free.pdfIn PDF document text
    • http://gazawadowig.22web.org/52414262941.pdfIn PDF document text
    • http://get3creditscores.info/58894123111bjqyr.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/easy_vanilla_cake_recipe_with_buttermilknlaim.pdfIn PDF document text
    • http://excschool.ru/35357319282g1bj9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moseligukunevuz.epizy.com/baixar_jogos_medievais_android_offline.pdfIn PDF document text
    • http://tumaselopewebu.rf.gd/guided_tissue_regeneration_dental_code.pdfIn PDF document text
    • https://1ee34b3e-bfcb-4e25-b227-79ffd44eef10.filesusr.com/ugd/9d5096_a9579f671ae24b62966e535da6f60f09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/gotham_steel_pan_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/71704269638.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/cairo_airport_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/web_browser_apps_for_android.pdfIn PDF document text
    • http://xojutavuvexiso.rf.gd/distance_and_displacement_worksheets_high_school.pdfIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_d31af60d30584af8a712bdd97bc796a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/ronijelitikimubur.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/39054536523.pdfIn PDF document text
    • http://dopovis.myartsonline.com/junie_b_jones_film.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_off00013a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8E 5640 bytes
SHA-256: 9f55d0b814f3d976ebbeb9a6a4ff36ae33de70e883e48e08808efad6fd3ee958
font_01_sfnt_off00014da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA7 11144 bytes
SHA-256: 772f75508c884dec4683a2e8d83326529f9af276d246066c2952df6a899634cb

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