Malicious PDF — malware analysis report

Static analysis result for SHA-256 12570264e0d5f438…

MALICIOUS

PDF

85.5 KB Created: 2021-08-05 22:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea8ec699d999de5034d784b377443101 SHA-1: 8be7a10accc5fa35149a7c03a387179cd6c5999b SHA-256: 12570264e0d5f438bc433e46c58bb1547776bbc5cc116ccb24edaf64c1a23801
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and presents a link farm on disposable hosting, aiming to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://scandirent-new.ru/uploads/assets/file/sezubojila.pdf In PDF document text
    • https://mattress-leader.com/media/56244798627.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/retedunavizibezokirib.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607193a416d76---luxokijebopululosawo.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/68128773006.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e3e4b6f95---27039940037.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/42993361372.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4ca2bd510---15273855772.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a807e9d000d---folizoxedozivesuvi.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/47226493143.pdfIn PDF document text
    • http://paliukenas.lt/i/File/84163075652.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec1cd1e22e---lewovamuzisuzajodaxowased.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/70025329042.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/derebatinalukodikewoza.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/silafemo.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/84392740517.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/1baf71f5d8398fc114d7a7ab1d256b70/12955282092.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd0aa3edb---xununipobu.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/bfc6tgjl806gsp6d5h026t2la7/nisilufu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3f8d55040d7a602a6d773bf2caa30edc/naburifikekasefedatak.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/10389206766.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/jetcj6bvodkk3ifok7vie2tomn/biruruxetiwun.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/9208c0a888a3c45076fdc66b636d1df9/gimifarelirufaderoxufela.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/89479154231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=crash+bandicoot+games+android+downloadPDF 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_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 17664 bytes
SHA-256: dca76e4aaeda686a26631af9890ab190cbc2ad2af579af287bd0ab659b610dae
font_01_sfnt_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 11072 bytes
SHA-256: 0c9a9e0154adeadd1a0b3c6d28e6dbf05799c6fb04d203d09aad7d5b37254154
font_02_sfnt_off00012f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1