Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c4d060de8596a2…

MALICIOUS

PDF

89.8 KB Created: 2021-09-01 07:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4039d9e3500851f9c95fe40530e617bd SHA-1: 2303a4f4b0b66ec72c77180eb33f2dada99f1cc9 SHA-256: 97c4d060de8596a235ce41314d93079a2025836b82ecc9d15abf119c4743e041
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm and a callback phishing lure, suggesting it is designed to trick users into calling a fraudulent number. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the document structure and embedded URLs point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be191a8922---39722685247.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca31f9003c---26831341997.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/14311094306.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4b3aa85b4abb405a11b20b86a3819217/dulobaforuzetemapiludox.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/vipowof.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/32440140517.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1f5bc30b---wogosivuwifidizedazilo.pdfIn PDF document text
    • https://vestol.bg/files/file/70585836906.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/1084965961.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/25809737542.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a35d1b30199---judamibapuwujedefeter.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/gexekupejopoga.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/835d37b90d29f7fbf60f2bf31931056c/57899636276.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/56441932914.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/gutawogufelirejako.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160dda0a690758---66913944585.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/97718853017.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/dujonurulugoxulumaxasopen.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/10835408413.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/mavodatadesani.pdfIn PDF document text
    • https://andrejc.si/files/file/82827663010.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/rivumefowesedumop.pdfIn PDF document text
    • http://katachizu.com/img/news/files/26380979471.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/82091357167.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/5t4cc4mdc1hpg6qq4rhdeas4l6/zator.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+does+god+providePDF 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_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 10580 bytes
SHA-256: 80dfe38c8b778a168132595d5fe1e4feaa48e0b1f54f4a169c562454b75ffe90
font_01_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F5 19684 bytes
SHA-256: 89856e0b80c3cc9e2e3634fba47e58de758c76099ee820deb849e3b9201dd46f

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