Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca47cfd59511ffdf…

MALICIOUS

PDF

88.8 KB Created: 2021-06-26 04:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc5d05ef0695f16d1a15a65e67ecdcac SHA-1: 9e89c0ef83b87788295954b3127fea6c56ea8098 SHA-256: ca47cfd59511ffdfc424ed0397c0ac4f127746b52952d240217d2d71df37c5e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely serve to distribute further malware or lead users to phishing sites.

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://iwanbim.com/userfiles/files/sokaminivibalad.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/o335ihhrabgguldr9qhpdntob8/bilop.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9683c5b8a---baxowenipisimawefeputexor.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/b5k0cca64s12thaajk2ibkj73g/modunir.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce3c2e3620---24104281880.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc5caa8c8b---diwilafisokawikox.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee5084453e---88258618067.pdf
    • http://jshtextile.com/UserFiles/file///20840902041.pdf
    • https://pristineleather.com/userfiles/file/95472631572.pdf
    • http://alexlunacoach.com/img/editor/file/67466231592.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc7f3d9a5b---jejugirona.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/bdce8uibs97p2saio2sv0ten88/31272001057.pdf
    • https://vanrun-it.nl/userfiles/files/80124434485.pdf
    • http://dzbnf.com/upload/file///gelomubopebadovidofob.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee4a64b7a---61901853053.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cf50e17ced8---nafixi.pdf
    • http://cafehinglung.com/uploads/files/6845479170.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/u1ftkr6r6nbi999vgi8mauegl4/45361177468.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0ea02f99d177bdf66b2ed0c977ca0f21/toxemovovajumixibuvil.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073e4d556c3d---vosifivi.pdf
    • https://asthasupermarket.com/userfiles/file/40563699432.pdf
    • http://tencanpowder.com/d/files/vebevemazafisaxanomulaziv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=introduction+to+american+deaf+culture+pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6720b85a0c499b193e802cac576242e5/fekovevipokadona.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f879.bin
ef6c06d0abf3637290fd107bf31231f6dc298a41f022030cdf5b323a277a4b78
pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 17384 bytes
font_01_sfnt_off00012586.bin
3fb10238444c4fc5eb92cd8891f4023904ba74618f673aa85ac3219232907763
pdf-font-stream PDF embedded font (sfnt) at offset 0x12586 10664 bytes
font_02_sfnt_off00013ded.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DED 16792 bytes