Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed232f0f53c80e81…

MALICIOUS

PDF

84.2 KB Created: 2021-08-19 08:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 22afd56725a641637a5955a8f2bf0e95 SHA-1: fcf9deb5edab66fe02e5de1c9c225921d47f8c1e SHA-256: ed232f0f53c80e81af0ad04896c9c3108f466437f84667ded792640eda558c38
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains embedded JavaScript and functions as a link farm, directing users to numerous external websites hosted on compromised or disposable domains. These links likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://bienenaktuell.com/sites/bienenaktuell.com/files/file/jerekunujasufem.pdf In PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/lf2u1clatfdqgeg3j9t2er4rrg/51028704610.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9f4e5d14f62595fe5a159581a40b3300/novikukeson.pdfIn PDF document text
    • https://proxus.nl/file/babibobonudadotipenij.pdfIn PDF document text
    • http://citra.cl/userfiles/file/81860206703.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/38668672984.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/luton.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/5bbae0e1e073abc518d8433b11d7edac/28673715370.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b58d29cbc---zifaxirubuwevepixamus.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/fapenixo.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/wujega.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9f10c790c27a752ca7314fe7b38a1b96/27940687574.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/tomakenos.pdfIn PDF document text
    • https://projetovm.com/uploads/files/83559693168.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0f4f7ffe05d9b6db39717f0e18ccc10e/97030243078.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070816289922---40628681795.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c07783f8c---befero.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ba6578f8633c5aaaeae574a5894938c7/8681977876.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/nogenojosiwiwerafaxak.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/mudesomusotibupexisixo.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/37620275855.pdfIn PDF document text
    • https://csn-alliance.com/data/files/bukewatupezagu.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/1t75bn9fiq5ehoaoefaj8cajik/josimovevajefalasep.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/miguruneje.pdfIn PDF document text
    • http://vtaky.sk/media/file/lugibibewimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=baofeng+uv+5r+plus+programming+software+download+italianoPDF 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_off0000e0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 18608 bytes
SHA-256: 84bcfe023da45d51e1adcb491686d2841d7c59b9f48d6576e3a735fd8bfccdc0
font_02_sfnt_off000127c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C9 11280 bytes
SHA-256: 148a97ee09b621a050368826f1da7215b337fda273ce33604bffa161c031896f

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