Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f9ce58469197ca…

MALICIOUS

PDF

107.6 KB Created: 2021-09-07 00:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9d271e6be65ba01697b020e6a85c7332 SHA-1: 386647b5deb54730f15becb66f9b75dbbb63bf90 SHA-256: e6f9ce58469197ca8308de37f208298ce1b441895cce0105d9a8ec91bd6fa89a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'Payment redirection / bank-detail change lure' heuristic strongly suggests a business email compromise (BEC) or financial phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://creativetechno.in/userfiles/file/32830728789.pdf In PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607576ce2f0b5---pipokixerifav.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/6f4ad1a6980ee9a0bfe5ca950b366651/wigaxisujedabavev.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/60426243478.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/cc7ec832c60287ec0e775570612dde98/sirunipesixu.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160839c8bb821d---gigawe.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/didiw.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/pisagumujimedifujuj.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/52747880471.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1ed2499d960924cd9be5a99aca2985b4/vofopof.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/nakadewow.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/xubof.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/9e13cd6d7125125cd30b812f0007a31a/vebudomi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6afe574e1e---33897378595.pdfIn PDF document text
    • https://music-group-store.com/upload/files/33282822522.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e0ec62634e8---tepowota.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/18940b3d40856a1302413005f7f9b73c/zuzuzonenigewosudikuwos.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/29311571945.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/22691528219.pdfIn PDF document text
    • https://botroul.be/uploads/99782451626.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609471f46e509---dibopabebobikunamu.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1fb1803a1---lelavufesekudeboj.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/bc386fecc4fd00314a24b473dbbc7dc4/nogokemaxona.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d4b8273c8---nomikakixukazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=give+me+liberty+pdf+chapter+12PDF 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_off00013fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000157fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157FA 11024 bytes
SHA-256: 48a4b4787df9a04b990a8fd5561d473be25abd8d03f53e3da12b1e330b4c69c3
font_02_sfnt_off00017180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17180 18396 bytes
SHA-256: f1afa2b8fc00c896b2bb2e722df780f94514e7428c80109b39e094bd9dee3b23

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