Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1d62c2d3762bf4…

MALICIOUS

PDF

75.0 KB Created: 2021-07-02 00:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 726296030caa41036343a6c675be575a SHA-1: d3a1fede87757d7abe63d15044b54142cf09351d SHA-256: 2b1d62c2d3762bf41dc7c8d11cfb5e6c871b424cebd3c654ba1a719386269010
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a focus on manipulating search results or distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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.
  • 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://churchofgodinjamaica.org/app/webroot/files/pejepaxedasited.pdf In PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8242d864e---52067981538.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qeub4gora0gl465t016mlkk1s6/12808795403.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c169444de76---tozupevusigemifebe.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/47310939421.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/modililib.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/n3gojp0oujubsh5vameqi81bts/pufibewosutawapugusatumob.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5208d0b5ed---46527986519.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cp10tc7n72o4riiiq0qcbpi3c/xudimedoworasopuvoz.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/nozotidexigisotozewet.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/97bc35eeba089fea20d17cf0cb83c155/3109225616.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/43774632396.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/ru9g2k6anj9lsd22qq6t2tgkp3/patazonefaxuresefap.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/benavul.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/tuwegakumubemelubi.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/49cba772749116125f36d1eab7fa4e14/54869260694.pdfIn PDF document text
    • http://fygl.net/uploads/file/310255283169.pdfIn PDF document text
    • https://taperagi.com/contents//files/xenekikexotum.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16076a01fe45d0---60478111518.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/2d25672b49b2fb025f49fc6d4d71f90b/fifex.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/klefvicop7k579jh43qbvjjbk3/37317818854.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608223b58b55d---fejopiwuwudibitemosaxu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/bulilidu.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061801061428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+print+off+a+pdf+filePDF 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_off0000c722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC722 10400 bytes
SHA-256: 63c96cf3e9731c00c3b6a679b3044618bb8a8ff12d76b3c979399263d7adde8b
font_01_sfnt_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 15788 bytes
SHA-256: d6cb90e20b742e61a44edfe6e1ad98f8a64c09ced1470de7cea4a3156bf16b38
font_02_sfnt_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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