Malicious PDF — malware analysis report

Static analysis result for SHA-256 04753f3729d59402…

MALICIOUS

PDF

74.1 KB Created: 2021-03-30 19:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 927e6daadc4b84008232b843e3bbe3b5 SHA-1: 56fd854a0f5288d44b788365ef82380761558473 SHA-256: 04753f3729d59402d2ee731fdc1a272f0d188ab7f71834fe9e888eacd9221ed3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/award?keyword=canales+de+marketing+y+distribuci%25C3%25B3n+comercial+pelton+pdf+gratis PDF link annotation
    • http://sipoxamux.22web.org/rodolireluziwiz.pdfIn PDF document text
    • http://itdomen.fun/data_analysis_tools_in_excel0elkh.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/94817820693.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/50516722737.pdfIn PDF document text
    • http://minuette.me/94040348993t73ml.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/rivisewelimubutelexi.pdfIn PDF document text
    • http://sewonmedix.ru/begubogazarekunoxidaliron8n.pdfIn PDF document text
    • http://kerorukaduwewit.iblogger.org/netgear_dgn2200_firmware_upgrade_australia.pdfIn PDF document text
    • http://cccckkkkkdd.space/ejercicios_valores_de_sewkv5a.pdfIn PDF document text
    • http://natosabi.mygamesonline.org/handbuch_zur_deutschen_grammatik_6th_edition.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/laundry_symbols_chart.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/bartleby_el_escribiente_libro_completo.pdfIn PDF document text
    • http://mibewoz.22web.org/sabikaloneroroxenojowosil.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/android_backup_sms_using_adb.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/jejamufigim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdd3b3d-a354-446e-9589-55d99d3b4f15/97363424528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a435382-75ea-4448-a8fa-bba05a0ba555/33775956417.pdfIn PDF document text
    • http://xawivirokumele.epizy.com/69775194520.pdfIn PDF document text
    • http://wemitagokodunes.epizy.com/descargar_bescherelle_la_conjugaison_pour_tous.pdfIn PDF document text
    • http://xinedebasutusaz.rf.gd/light_reflection_and_refraction_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04737438-438f-42cc-b493-528051ee29de/naduponupafu.pdfIn PDF document text
    • http://dizoduji.rf.gd/69696311902.pdfIn PDF document text
    • http://renowuvix.epizy.com/princess_bedtime_stories.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_off0000de24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE24 5820 bytes
SHA-256: 172a0043ad4fb35a6faa198730bef5ee3432d6527444886b197d3fdbad5c50f5
font_01_sfnt_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 11592 bytes
SHA-256: 096a1287d79e9177a8b92bbbe89c90a40d1048394aff66193bc6f594f7fe57f6

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