Malicious PDF — malware analysis report

Static analysis result for SHA-256 9333840b3f63bee2…

MALICIOUS

PDF

80.3 KB Created: 2021-09-04 02:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 34c6b0fc5d140045bf033114a8bbfd39 SHA-1: e51cddb77c93aafac9d4201f6734a3c00e8e90e3 SHA-256: 9333840b3f63bee2b6973c5aa3d4e91708df817184e5e684d710dd289d198d3d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URLs, many hosted on compromised WordPress sites, suggests a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with callback phishing or tech-support scams. No scripts were extracted, but the overall structure and URL patterns point towards a malicious document designed to trick users into engaging with fraudulent services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=life+after+death+pdf PDF link annotation
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/43326c5eaaef3011b51f89c3fecd72c7/73292359954.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/50746807510.pdfIn PDF document text
    • http://sepremprod.fr/www/images/mediamanager/40231819930.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k0qgj71a54n4q99jkrc1s96qs6/38753186891.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/61287735530.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/43491740352.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/tibujenetuxiso.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/tabapusawerukejefem.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbee31c7ff---92624069347.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/87047453641.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729e07e7a05---49541629392.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/moneledajazujeluleziv.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612071fd8bc0d---mowutabiwajomemew.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/depovemozaminotizeg.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/c3a3f63efd19ceb622fcf2b768ab99ca/mifesogafexukorowekipol.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/72606911292.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210625_084956.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/ebe4179d3ef5984dd4ab16358c76bed9/ririgedidakuvugokolifuko.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607232d4469b6---fovejunafunotuxa.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/83019940187.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/88lt2eucbov6aohom9effg129f/kumozo.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/3hjaa6tecmbv3vb7llgjgntdnj/lifizabifefafubatekivu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b693e715ee---94482651387.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/657d9ec853a944bda8af701cbd0d0dd4/14173396473.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_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 10116 bytes
SHA-256: a62d7ed7263af10772bfe135fec4bdc54df5e696b1fa349d419643c4cf59e53f
font_02_sfnt_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 16996 bytes
SHA-256: c55da48792f9ec7eccac4826974d82cfda18ec61d2f3a9cb3ea537a119f72088

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