Malicious PDF — malware analysis report

Static analysis result for SHA-256 6355bf5832b8968a…

MALICIOUS

PDF

252.1 KB Created: 2021-06-25 17:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a67ab74ce1687e0f809205f82376199f SHA-1: d9422d5ded1627b58d2e63d108c573f80ef76031 SHA-256: 6355bf5832b8968ac695f7df50620c036d4211bd4aa895a893dd0251088a0284
146 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 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number to trick users into calling about a fake issue. While no scripts were extracted, the presence of numerous links to compromised WordPress sites suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • 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://paklya.su/design/img/upload/file/37574314308.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/da372333333e750d3690c20b16d4d591/dejazivaxi.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec739e8305---jakasukejev.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/80f43bd2efaca124a487f23c8c2e3c9b/wenaruwogazofafolebopeb.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/52439759a718c7f5bd8279858bf929ff/sosigaz.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/h4uft1ut2e96qs9c0otnvf21mm/79687260756.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc96836f4---72649972619.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f8af8cc28---64626767456.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/zugajugokobijasuziw.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/101047041637.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/40641937486.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cef87acd0---57281973352.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/lilanuzumenogemofowuwe.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097a8bfd7499---xuxikijopinob.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/b7g8e2jq36oeu6lauvg3n7751u/3166911955.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=lesson+1+solve+equations+with+rational+coefficients+answer+keyPDF 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_off00037b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37B2C 19724 bytes
SHA-256: 21878ded5b143b942c02748c9e2bcc57aed587d22c2c372b1e2955dd0d488304
font_01_sfnt_off0003b067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003c87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C87E 11048 bytes
SHA-256: 9d4cfc5531be37273d860c74068cc0c6e28012e8176c898e32d1437715762aca

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