Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4f0ad010b3480e…

MALICIOUS

PDF

88.7 KB Created: 2021-09-17 21:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 375bc2966428229efcbefcaea2fa064f SHA-1: e1d045489d193cba1c487755686081402043c59b SHA-256: 0e4f0ad010b3480eda6e26d239ac33bccd2ad5cb901eb3189fd35c1bc44d16db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, indicative of a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=gizmo+balancing+chemical+equations+worksheet+answers PDF link annotation
    • http://dispensapertutti.com/userfiles/files/pefime.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/wofor.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/be0826212a62516a6c24f87efbf6f999/guriworixadutaz.pdfIn PDF document text
    • http://rococosofa.com/files/files/mudukam.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/koputiwume.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/fekokabujaxani.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/99978348714.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210903115656.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1631396039.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef61ea76cb---fojopojivarofofoputi.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/petufebak.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/wijomezezirunipaduzuwe.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/95862752979.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16141277f337c4---woratudulezenifajida.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0ef263d93aa69123aa5cb58a276b3880/koxaxonizomikobajo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362bfc53ca2---ranewufepotemetupesatoda.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/37990313661.pdfIn PDF document text
    • http://thevalleytrader.com/files/fedisakanaju.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/nubigidajixajepadenojuru.pdfIn PDF document text
    • http://kme-kme.cz/files/file/lopusivubumadofebulew.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021917844331251.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/92666560684.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e7345d6ba---84709867688.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/furomesuxokedatogobekowa.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/sukozofixetebadoxiz.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/45035801144.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/58717736123.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 17180 bytes
SHA-256: 27eb817f339d7aaff71c810246bfc20d4da8bdc09e7017a0400e3f404cbd1e4b
font_01_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 11340 bytes
SHA-256: b870475cf0ec6f5239f7ebf378db3c8ec167e9c6e77ddd3983d87e017617bda0
font_02_sfnt_off00013c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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