Malicious PDF — malware analysis report

Static analysis result for SHA-256 8802f19701734cab…

MALICIOUS

PDF

77.2 KB Created: 2021-10-03 04:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 637add9c6482b46e4fe9c535008caf4a SHA-1: c6ee4909f1a00391e5dc706287c5492aa4fdfc79 SHA-256: 8802f19701734cabdff2ff6e97e60d03fe010c47abca034a7349210ad3880fac
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised CMS platforms. The document body is unreadable binary data, suggesting the malicious content is not directly visible text but rather embedded links or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://garglob.ru/uplcv?utm_term=barbie+dreamhouse+adventures+three+ring+dreamhouse+full+episode PDF link annotation
    • https://oazapiekna.com/zdjecia/fck/file/xaxinobazititujemubeso.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/pejugotitanajuzoz.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/toval.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/9991399606.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/46404560211.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/nebevubopibinujegut.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/gizunigukapawavoji.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf49b8468---kebotowumubebitaz.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/a9c217481c6ea812d8b4832287051f9c/63092925089.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/tegadug.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/50055139268.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/62337399050.pdfIn PDF document text
    • http://adveotec.com/img/file/zekirabofafewagipon.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161327760dba2b---matedesoritinip.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/88030686288.pdfIn PDF document text
    • http://kbchina.de/upload/77565304699.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/musokeb.pdfIn PDF document text
    • http://garderoba.sk/images/_file/34823481147.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/37661465866.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/bitonanojozomakemu.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/bosemalifogekovavogozad.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/38561341496.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/64355312587.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/61193684412.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_off0000c1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CB 19424 bytes
SHA-256: 3e71c2ed99f60ddcc658ae7fac0c1c484e83a1723a652877e250c0c3242d8471
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF7 11304 bytes
SHA-256: edfd118ce1842d0661bdc4ca51f412ad4dafc5c332a89ddc70eef66283fe104f

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