Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98e1d8a84650a5e…

MALICIOUS

PDF

93.7 KB Created: 2021-09-14 02:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5b25aa37d31ad7d8b7ad6633c6a45b95 SHA-1: d777db9e0ccd79b33b7652da27593ceb826c68f2 SHA-256: d98e1d8a84650a5e3092fbc9295978bac2716e81c62c4095c0e4b1f84d5da480
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that function as a link farm, directing users to various domains, some of which are hosted on compromised WordPress sites. The presence of 'utm_term' parameters suggests a phishing or spam campaign aimed at luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 https://nomylo.ru/uplcv?utm_term=xperia+5+ii+dualshock+4 PDF link annotation
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613747c2d0ed6---57688573611.pdfIn PDF document text
    • http://surtek.biz/image/files/20150329_003952.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/o3664cd9huikvon5nkv8iig8e0/ruwazegaxeduwegoze.pdfIn PDF document text
    • https://mimpishio.com/contents/files/477049501.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/vumatevosotati.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/70211295792.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/42f9ade62de67f94a7d119956483bf25/xexipitum.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/16250151768.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/rizejunejerogevewixivem.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/77984623339.pdfIn PDF document text
    • http://bamor.org/userfiles/file/jixatogemewemabepevuxapi.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/wegudovab.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/9046225247.pdfIn PDF document text
    • http://quranday.org/userfiles/file/sixamepu.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/pazenojaxi.pdfIn PDF document text
    • http://kammed.com/userfiles/file/79775824478.pdfIn PDF document text
    • http://accronline.com/userfiles/file/29132262823.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/tulobepidawegigamaxuw.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/86218676753.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/lezes.pdfIn PDF document text
    • https://lecachet.fr/docs/files/36402711608.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/jodasesogokitekij.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/kakapomugejovunorulu.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/fewunudurolekutavonifajiv.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210906_CD6943F140202451.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 25420 bytes
SHA-256: c19e5512e9e4d657f790a7475f6e1d05530d3d46d829f68c1cdac56184cca3d5
font_01_sfnt_off00012ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BA 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_03_sfnt_off00014f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F72 10820 bytes
SHA-256: e08249c1cdbd305cd4012cbcef978da0e916e34ec8d46f98a82f3cfa3aa60d52

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