Malicious PDF — malware analysis report

Static analysis result for SHA-256 732156d25627aeaf…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 12:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cd832082440a0b59395819caf7849961 SHA-1: 95341c7623b0a08a1138b8ab6140cc1a6049de0c SHA-256: 732156d25627aeaf5b3e7659b4393db54c60ac45a1564ccd1c9d66bad5db1031
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=sharp+lc-60le650u+backlight PDF link annotation
    • http://rejemezurufoveg.mywebcommunity.org/serid.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/73649661115.pdfIn PDF document text
    • https://jigadukux.weebly.com/uploads/1/3/4/6/134682377/ruxivevabirit-wajegewagox-piwadowudupe.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/how_gm_diet_plan.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/4875531.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/44771294117.pdfIn PDF document text
    • https://rukepeninosiwul.weebly.com/uploads/1/3/1/4/131406291/mofatevuzamuf.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/sql_for_data_science_edx.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/sidilozalu_borumenekav_sibivarozeradus_jeramodebuzemap.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/cc148.pdfIn PDF document text
    • https://kisetizep.weebly.com/uploads/1/3/5/9/135992433/5c4493bced.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/tubibenowok_zesililileka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulisuka.epizy.com/date_format_english_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/darkwing_duck_theme_sheet_music.pdfIn PDF document text
    • http://jopokodex.rf.gd/73978136897.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/lejegebakozomosabate.pdfIn PDF document text
    • http://xepadegi.epizy.com/drip_irrigation_system_project.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/economist_guide_to_management_ideas_and_gurus.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/beretta_92fs_trigger_weight.pdfIn PDF document text
    • http://mapexas.epizy.com/79800247587.pdfIn PDF document text
    • http://sumorililuduj.epizy.com/business_information_tech_course.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_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5776 bytes
SHA-256: 9a53ff393f5e89bd92807019d40f5fe28ad51bae678e707eb1401d01d2f277c4
font_01_sfnt_off0000fddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDF 10808 bytes
SHA-256: 0cbc168f877a990b1d53a5e6da537e44f3f55e9c4eb98394b3cc59c22f5b253d

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