Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ab94c098404614…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 18:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c200ceecd90f931f0edf8fa64819d55c SHA-1: 7544c9c51d799eb2a4cfd3cc1eab1aebe3806056 SHA-256: 14ab94c0984046149c3be400c3f9993aa343a4855159fdf6d85c76959794adb3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as a distribution point for further malicious activity, such as phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608396d386cda---72638313712.pdf In PDF document text
    • https://dolupin.com/calisma2/files/uploads/wipomunubemisozawa.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/am3q324cco61cige0p3us9a423/rikasilibowu.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ef53a6bc---54614577686.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc3462830f---63276771437.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/1423132380.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/m1vo9d3a1ies8ubgb89qq07q03/74499455657.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adda2440510---dixodofudinaf.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/73160092235.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/tofafekorozonenafiwar.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/zetuzalelujox.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/podebeliralilup.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/rutufezufojuduxorafiburek.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/zigemurekiguzidivemodeziw.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/vidutegixe.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/bubakenutekup.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d113587d5---bufoma.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b5814ef4c39d80776c62988eeec6e186/89718883726.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/nomukiwivugiribujebimex.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76b12108c---35768826526.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807e620dd15---9466432751.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/ba70e99f1215a742bfa6addb903fddee/xonuwadogasu.pdfIn PDF document text
    • https://promise-land.com/upload/file/24962872236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=lamentablemente+estamos+bien+pdfPDF link annotation
    • 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_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 10656 bytes
SHA-256: 32941c4b6c6eba6d0a8774a1ac322f3289fac08bb911cbd24709d5ff2d8b8d17
font_01_sfnt_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 19108 bytes
SHA-256: f96ad8f4d86120024e61fde514aa1c11d8cc54c8ba121be7472207f6a240b846
font_02_sfnt_off0001234c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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