Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3dd8b1e59dd780…

MALICIOUS

PDF

83.8 KB Created: 2021-09-05 06:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 73e5920cb6874c62c150ff3b1626202c SHA-1: 08c3b72069e1ef014981ff3e1597b21fa08109ec SHA-256: ed3dd8b1e59dd780cb69a23601689011526097ed694e575b44dc494946895877
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that exhibits characteristics of a phishing lure, specifically a callback scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into engaging with a fraudulent service, likely by downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107f4912d8a8---13235258832.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tv07c5b3emgdapk919kfre16j5/lirodafasifixozivumu.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/84472704914.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/wiwapedaxekakorabob.pdfIn PDF document text
    • http://wangnatheater.bpi.ac.th/ckfinder/userfiles/files/tojepodevojinoban.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/30bf8a18d703a9522bc8a0fc4213fb2e/30612669980.pdfIn PDF document text
    • https://gute-reise.ru/i/files/files/mutuwibinilagezofup.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/90166518569.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0b1dd6fa0fbe0a74acab3483c56f864/25348103980.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/1c569492175a43efd9b0d2520531441a/37207204452.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/zebapidasuvabamelas.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/83876645170.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd537ba96d---18737536650.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607309276c049---29388932293.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/5121231058.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/mofovixiwos.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/85406223492.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/xijotorinalukubot.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d19c4c604e---zitorurilobujuwofi.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/77676617241.pdfIn PDF document text
    • http://platcometals.com/images/file/44414440069.pdfIn PDF document text
    • https://orrizon.ru/images/file/lidurawovubefiba.pdfIn PDF document text
    • https://schmitz.cz/res/file/soxodisudejufibo.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/raneme.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/wulalojubokufujovumizuvet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=science+worksheets+for+grade+4+onlinePDF 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_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 17188 bytes
SHA-256: ebfe24c3a635cde5db3ef1f369057969a2483accd05cc41634e9e32c64b9d80f
font_01_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 11088 bytes
SHA-256: a2bc017970b61f884285cdc40f87eb4bad665863cbb1ba49934321c1dfcd21ef

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