Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5734c0980502000…

MALICIOUS

PDF

84.1 KB Created: 2021-10-06 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 4453b7fbbccd8aba429988b7df96aac6 SHA-1: 60518a5802d8b7e683037f52b9f36b17522eac86 SHA-256: e5734c0980502000e44080cac0705ed77ff1d34cefa1de6c3140aeed6979e0b4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting. This suggests the document is designed to act as a link farm, potentially leading users to phishing sites or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://kalendarz.probik.pl/fckeditor/userfiles/file/gobovejobowarijojarur.pdf In PDF document text
    • http://lawyergz.net/uploadfile/files/82965514644.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/zajopirijolowisazujivewub.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/40918314706.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/575faaae672729228f6b98a87f672111/87306086160.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/jozolo.pdfIn PDF document text
    • http://sd-bada.yupucx.com/upFile/file///ITX202110061404234756.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/20309353099.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/70826104041.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/18250892520.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/vojuribuzuzudoxufeb.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1614f8f63030eb---kafokogefo.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/13455687294.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/15197740108.pdfIn PDF document text
    • http://space-edge.com/upload/files/90972002976.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/14771599868.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/fokaxo.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/sivezinuxanefibugem.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/50237340396.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/97194508633.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/78211382990.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/nbbi5mav2s9530s98avh8roo13/fiwif.pdfIn PDF document text
    • https://kaparatt.com/images/File/83142956014.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/41411928154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=mouth+corner+dimples+astrologyPDF 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_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 11168 bytes
SHA-256: ac0ba62158d42c07d42ce50937675ad2c9c4be324724d92fe8a13940086c1db7
font_02_sfnt_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 19820 bytes
SHA-256: d1f93e7d14d92fb851b24caa0fa35e33c13bcb734db35466fd1a99da94b7c04f

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