Malicious PDF — malware analysis report

Static analysis result for SHA-256 00941d48d46c1dc4…

MALICIOUS

PDF

80.3 KB Created: 2021-09-01 02:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce32e34eabe360846d4a879e9aacfcee SHA-1: 34a850d4f15828cd6d534b5ca4e7ac43c69d6711 SHA-256: 00941d48d46c1dc4155df6d0a17d67f20b0427d6644a8c84f7af9d010fda42c7
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.childofafrica.org/media/userfiles/file/suwikaganunujajesa.pdf In PDF document text
    • https://senhewood.com/d/files/81469866953.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/pg1k4r9dsrl9ugkpotvtg402de/85502481938.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/ecfe82dfff70f649d8802dd549d8ae95/jabisakivolulebug.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/81c4c9a6d0124e7594cf89c713a3b37c/41152463598.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/lebid.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/kibinuxizilutukemokadag.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1a240bc0aa989393772fa0583fe1f5a7/sirivofalosobilisixivafol.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/pubolixese.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021073108113773499.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/80256269278.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/50520997571.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16103c21cdbdb7---zewoxokinafilox.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/75554311877.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099bbbaaf8e5---94728581971.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/jixosemonewakanofi.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66f2bbf56---92193941581.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/tadenumaposojozatetimik.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/96003792093.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/01c2172cfb1cb20f2a2437cb59cb8a72/64391236498.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/aaa313a5565da75895eeb6b85fdedbc3/gofetuna.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/18287adab05db03eab597d811ee9eca5/vazirakeji.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/ludikamijivesu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/59da847e361f3e38a3d6c829e957429f/nosufom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=india+physical+map+outline+pdfPDF 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_off0000d270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD270 18664 bytes
SHA-256: 549ebb0229cc65cf0e4b735d826a216a65bd7199ac7d4f8540570cb3c5ad81f1
font_01_sfnt_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 10948 bytes
SHA-256: 78455bde9aad3d85caa20c39b342927ca38efda2b73d49df7270a9a7f4534051
font_02_sfnt_off00011c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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