Malicious PDF — malware analysis report

Static analysis result for SHA-256 018fd0aa5568be59…

MALICIOUS

PDF

88.2 KB Created: 2021-09-12 15:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c62bb64e409072f997a3305ab46ea44 SHA-1: 64281720013b70f1bf755d95b92ff3b3160cd00b SHA-256: 018fd0aa5568be5907c166f2f29916bee70f66212645fbca92304ff3342d5e00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/d17e9319fb3ab8935f7f72ee26c926bd/13722997198.pdf In PDF document text
    • https://defi128.phpascal.com/userfiles/files/dadulusafake.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/gabubumugeninox.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305b18d1399---sivolutatejub.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/53685333514.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/siwupukavilojolojijiba.pdfIn PDF document text
    • http://clingac.es/d/files/50565711631.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/73018286494.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/78208933389.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/98899187385.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/44315703131.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/81714518181.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16130c9a047e18---60609901455.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/90272734580.pdfIn PDF document text
    • http://akademibt.com/resimler/files/fimosumawopul.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/45938010917.pdfIn PDF document text
    • http://beta-rc.com/upload/files/tetofovamisekokujudetomo.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/66187923464.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/xamavanejibinat.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba4c33300e---57695856595.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/rudivozuzedubofesupoxor.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/28667958941.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/32147639258.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/panoxovugazomewuxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tethering+windows+10PDF 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_off0000f413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 18112 bytes
SHA-256: c599e97616ce0558b73edfbaa9470292347ce182777f3928bb381d6c71749579
font_01_sfnt_off00012327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12327 10544 bytes
SHA-256: cbed4c044c856f2de08f8a02b84482c10f3fc39a27bfcbdf5773247e9cd831df
font_02_sfnt_off00013b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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