Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d049d8be787fc6b…

MALICIOUS

PDF

92.4 KB Created: 2021-09-07 09:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5c879e37dd0f8fd44513077151204d4e SHA-1: 9fa12e59b5d3dc4fe4e243bac3541602da9f693b SHA-256: 6d049d8be787fc6be3aabd70fed30a40f2365f1f146df9d176e975f47f5fa629
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The document body is heavily obfuscated, but the overall structure and URL analysis point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=convertir+pdf+en+jpeg+adobe+reader PDF link annotation
    • https://thietkeweblongan.com/upload/files/jamoloxodiloxaxemurulo.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da73ac71bee---fikiliwuvebodoxuzisog.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/kaleludobuxubojokasoga.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9ecd3e72d---tidagijonigosujasuw.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d5870806e---12206776293.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/117e551d7782c96edcd4924f473b4245/nidagakuxogulijewupolo.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b325aeb6ce---45357348736.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085056a218fc---66390919283.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/fojedugazafixagad.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/24742094604.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/26655159386.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/jidazinupobemasixiz.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/vonipisumajaxa.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210903_124454.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/kejidipetofulaxobezimi.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/zoxupekesunatofibetatu.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/bf509dfefe33126c66fb1dddc846634b/2011218031.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc85b912f---77088722773.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2b14724a---tarefaropiti.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/fejirasabanofexojapuvabo.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/31272598373.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16081b1656e1ae---vukogoxamojux.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/k4gnsf0pv7kjsp4s653sq3v852/61786326113.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_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 10824 bytes
SHA-256: 0c91743cea62a15144c770b956576bcc5873528d719897680f18277cbe0920ee
font_02_sfnt_off0001328d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328D 18964 bytes
SHA-256: 8595a3854f686ebb39f43b187a01cd697cabde68674853812c5a377ea81cb019

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