Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea84d7b1231c6838…

MALICIOUS

PDF

106.2 KB Created: 2021-07-20 22:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aaf257ff41c2f6bc3754c2998ed190b0 SHA-1: 29630005d9d89dc6a8177d9e6025bdca3d387425 SHA-256: ea84d7b1231c683845f1997cb08f9821ff69fb6659e1fff2e07321d20d115d8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a malicious payload. The presence of embedded URLs and the nature of the heuristics suggest a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e1f82f8f9---balafisulebakumafotatugu.pdf In PDF document text
    • http://jrmhandling.nl/upload/file/59997639356.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a28eea141e47adcabdca9887fd9bc9b9/jifejetilubetexa.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/vawigawe.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8c4a5b38c7c0dfefa09229eb0112e263/44508452026.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb02884a32a---15713165544.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/467979f632062b4335e874516a10e062/37656677971.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/sq1h6b2ltpplppig10585l8m1a/jitaru.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/fojajibonagikizisafemibu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094653a03812---6487779393.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607394ec0bac8---34774176088.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/51520133081.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160774d8d007fb---fokilenoledozibava.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/ee6996ef235fff61ebdfebcc5ae99b17/40900086746.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/90c4b9d7e350a9cda28fdca8ae6c104f/ludikalukafejokovino.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/95213048485.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e4dd995ff09266a75e680025a1ea345f/lilafipebumobiluminiwof.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/d2f5b05eb6255a97943573b908f735d8/nivasuwifososugewuvomimiv.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/zizam.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/8tc2it6kqvug73ugmu1rlfe2d6/82870681966.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608002b214c52---mabajujabuvebatu.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/1dhstdrkrlveb4oqoh8jfik2td/24755810385.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8881c1ad1d---sozikako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+a+brief+history+of+time+bookPDF 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_off00013a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A22 11052 bytes
SHA-256: 7bd2086e26ce789a74c4bdadcc8973544a6e67a218eff07a3bf752a1198b18c8
font_01_sfnt_off000153ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BCC 18208 bytes
SHA-256: 726e11c419c762e07bbb3b8abcc056d5fae0cefeeddcfdd4e232fe20a6cf7278

Open this report in the interactive analyzer, or submit your own file for analysis.