Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9c7c2ec5984b1a…

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 06:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cb59fc55ea3214f5fa9303bb88669664 SHA-1: 4da893cfcb6027c0d009132a4b4dfa897eec9849 SHA-256: 5e9c7c2ec5984b1a1f44fd9450465e3d69bad9061e6872e9153db3af1be2c816
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, a common technique for executing malicious code. The file also contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host or redirect to malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/f9g1asbv439f39mprn0it0nqle/21639679902.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc31624112---mokafetavunanapa.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/0cf53f2f81c14d90c791fdebd7bd91f9/livap.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7c8a4668ad6356cbd8b9ec8e098151c4/rugetesowizupanebal.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1m3v0rt9ehpakj0o0n7rr5keib/rudivedidid.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/wiposetarolozos.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/77e13ab7388219dcdc981c2f9e60ce1b/patudanizozotopazo.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16219874101605606999.pdfIn PDF document text
    • http://domplus.su/userfiles/files/zosugar.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/77477353348.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5d2c8ebd3---20190059883.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3f5e4015729207b52ec379426771402d/24402336290.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57ec3e466---jepugediwen.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6783ea4ae2---17550824074.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/46928130551.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d23ece22604---gaxoropusotolokalewovew.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/da2aa7446b0b1cd6faceddf707fed0aa/rejowudetivozigetifavu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c664c0a34b3---7412838057.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d593e69e42---kifonuwa.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608485fbe4c60---gezefarezugawosi.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b169d97f8a5---91668676506.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/86965038823.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/vevedapubetale.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/0edc81d642d72daf0f617108dc16270c/kixususolozaterisel.pdfIn PDF document text
    • https://cargotavio.ru/files/file/fifuwevepis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+law+of+segregationPDF 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_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 10544 bytes
SHA-256: feaf1b8d8aec07173897f332f95373e9be528a478cf16321b1054f038569a7e7
font_02_sfnt_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 17508 bytes
SHA-256: d2e5da5d9151104533d405fb9f8faa4de2a745ed1c137095fb08a18493c90a7e

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