Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac2a0e79ab0fbc7…

MALICIOUS

PDF

99.2 KB Created: 2021-08-07 23:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 785c0a02bc369d36bd99d3f74944a1c3 SHA-1: bfa8b8cfb324ae36f55a939bc8c5079086d241f6 SHA-256: 7ac2a0e79ab0fbc7b7c90ae8148b908df9e5bb736122dbc1737db7972f960e43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm is a common tactic for distributing malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://smidgel.ru/uplcv?utm_term=controle+g%C3%A9ographie+6%C3%A8me+r%C3%A9partition+population+mondiale PDF link annotation
    • http://myapartment.de/web/editor/files/5281851816.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/65033437690.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/93460117708.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32947aa111---57970944185.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f19ff9cfa43---70841247333.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c57cbdbd8f68e947b3d7910e057beb9c/goboxowukawofa.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/28853385705.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/wowasekonaropigonizoju.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f2c916c97---dugeje.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/fekafadusazijakisudaj.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/juguwusuboduxipe.pdfIn PDF document text
    • http://idroter.org/userfiles/files/73778153968.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f274f1c03a---tejopaj.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607746322be3c---zetotekolitozotu.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/15783577053.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fbfa6cde9---jibasavusegelagoxejusa.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/goraronazatadipaga.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/vawoxitawonusosugakata.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/losakinazijoxojipumi.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/nurizositegubirakil.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/6f446cd6ec54861ea4cae46c4ed12d97/mawilexubegenofomiveb.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/6qmlvmgqn7vkv1lbmhc4nek859/kitip.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce6e25cca1---67897692478.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kejubiza.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/wabixa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A0 11280 bytes
SHA-256: dd2adf24beb149be0c06a4a5b0e566476f114a6b8bac287b4e6dde1c17568fcb
font_01_sfnt_off00012e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E02 20876 bytes
SHA-256: d9b891986b7f1c8f4692e22b380e3c9b360e4fd405eeb4f7f1dd4aca7586bf6e
font_02_sfnt_off00016281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16281 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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