Malicious PDF — malware analysis report

Static analysis result for SHA-256 d717ce655023f7d5…

MALICIOUS

PDF

78.3 KB Created: 2021-09-05 07:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9c6366d5240c033ffc639b7ec69b35fc SHA-1: 949015373489b96c8b184f6c3d4fb574c7b5d508 SHA-256: d717ce655023f7d5bbdcf0b966fb0dfba3a745e26d22d931e307e665313f6532
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a phone number, a common tactic in tech support scams or callback phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://ketchas.ru/uplcv?utm_term=viva+pinata+trouble+in+paradise+guide+pdf PDF link annotation
    • http://96rangjai.com/userfiles/file/45912524288.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23b454aebc---76673172454.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb173655803---fozabonoro.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160874cc09dde7---xibuvuzasesaloderazefavon.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106064b7014b---gakotoradozeworutoluzod.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/95a5fc32e36103daca7dfcf8f0549cc4/geboworobapuvedomimuwux.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/69121547586.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d854416cd1e---20604198081.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/47659259626.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e75a4c52f---39512662005.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/46cfggao74u9qn9s0l79c4lale/83117478061.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/63a9e590a5e61834d7065514fd5eaf11/96944650074.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/54501767287.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecb8ca5ff0---gitasulepovoxupovo.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/cdad31d87c63d98bfcb3c89e4e7bda7d/lasexi.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021052719033673499.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad8467dea4---2415782471.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/45285459198.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e977cc428fe---pisewasekugujapixika.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/5073436574.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/3250759080.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/xowiwipugem.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/dobunedalijagipudibib.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_off0000cb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1A 10948 bytes
SHA-256: 7188b346ca981d8170ca4a6da60652c6eccadffcbda1dcf8a24a1b3b3c732e07
font_01_sfnt_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 18252 bytes
SHA-256: b2bc6fb73988c893d13428828276d48283d114b023dfbb128bebf9a2cadab24f
font_02_sfnt_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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