Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d47b48dc39ad60d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-29 01:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: db23f888958f09f54f6bf8c615e73fa4 SHA-1: 313c8d67ab21a1dd348df2b4f49d75bea5ec53fd SHA-256: 9d47b48dc39ad60d98e517d2764ab48d2e5b0fd7a91d3a2a29a260d24c02c5e9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URLs, many pointing to PDF files on potentially disposable domains, suggests a link farm or distribution mechanism for further payloads. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 https://ijtm.in/userfiles/file/43693278923.pdf In PDF document text
    • http://dolaninsurancetx.com/customcms/uploads/files/fudobomawu.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/33258797460.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/22509755175.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/34509970296.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/vujum.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/dakagalob.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/49557033592.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/fivuvilakoxa.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/373ad15b027298d649d3cb1ed4c1566f/16965770401.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/kedose.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/6563666056.pdfIn PDF document text
    • http://paradoxine.com/upload/files/95276535710.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1183797498612f13366047a.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/d743f3efa0b0377d034a2a7c512de8f2/nuratexiriwezinodadezo.pdfIn PDF document text
    • http://metallpress.ru/files/27527147658.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/74561480642.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/14602720083.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/jakafuxidixiguxi.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/89001081048.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/20125740209.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/poxipetafozepaw.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/62650726160.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/22895792217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=android+app+best+practicesPDF 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_off0000b240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 10580 bytes
SHA-256: efb0f2d49c511a6667bfe8c5155152d496f5e90ff588e560a9318cd91dc64bae
font_02_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 15036 bytes
SHA-256: 690bea58d501838412f5613b2098e4df768708e4dc3ffdfd64cc5b9f28b7ccbf