Malicious PDF — malware analysis report

Static analysis result for SHA-256 0219c302f62ebd0c…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 01:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f79c77d999a5545bbe67a02ae4073b33 SHA-1: f9faefcc5ef1e4f400be757d63607fe1bac7e819 SHA-256: 0219c302f62ebd0c816c0af0e3e68d08c89a8da72c598a11389d165b380ba299
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous disposable domains and compromised WordPress uploads, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farms suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pixomot.ru/uplcv?utm_term=bengali+comics+pdf+free+download PDF link annotation
    • http://vigova.com/Images_upload/files/jikefakefuxalovopuna.pdfIn PDF document text
    • http://chengzechem.com/upload/files/jegamela.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161433c2968f7a---jizozixepatevifamomow.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/joxajo.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/juletasoz.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/73875630373.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/jamewawinemokewisusazu.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/9969734924.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/muvopevijoziroxeturegijad.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/83877452500.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/fuzenolumepulodoru.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/mamogiladejejepogibi.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/16401545775.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/a5fedfdac7901c44167a6dd39a123ee7/15391421137.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/xozug.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/banebutexageme.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/wolefexo.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/bimozefimatuvelalavizatoz.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/64869552746.pdfIn PDF document text
    • http://accronline.com/userfiles/file/44140182757.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/382fe0ff4879158ab8728ff24193cd1e/mujakitorifimid.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/benisufinivepefimasota.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/98037986969.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/niripusokuk.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/63191807684.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6B 11004 bytes
SHA-256: 450405fe3976a649f15dc8b60f0a36ecec0078abb8aae7374b37879fa153387f
font_01_sfnt_off0000d3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CC 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105
font_02_sfnt_off0000dc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 20520 bytes
SHA-256: 12334bea854b0a63bac1b7545d8476dffd89a454635eaba908d6b92ae72cf304
font_04_sfnt_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 16668 bytes
SHA-256: ba7b22056b9243a58009b7c7c5261d5c9a4b7da77e02f13c135a3935d3870c43

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