Malicious PDF — malware analysis report

Static analysis result for SHA-256 998230d2ee9ea6c7…

MALICIOUS

PDF

98.1 KB Created: 2021-08-19 19:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4b5271a4d70e3d9a3718fc691c63be84 SHA-1: 1462cac3e3c3981f7cb3802fbf0ed26854d8041a SHA-256: 998230d2ee9ea6c7f58602537039213517e7a443c0404ee70a213757fe20696b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, likely intended to obscure the final destination and evade detection. The presence of JavaScript actions within the PDF further supports its malicious intent, potentially used to execute further malicious code or redirect the user.

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://ithaca1962.com/clients/41687/File/lovabeze.pdf In PDF document text
    • http://optikametuje.cz/userfiles/file/dudetuv.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb74782da---defazonasumabotorul.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/dfj8mrejepuobekknb5njl15j1/95351471357.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/juzef.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a17fe6b5bec---dololugo.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/84947279813.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/88000653228.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/kibunuku.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/36866403113.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/61102879699.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/b1ed95cf6249820d2769c91edf38ee37/kojow.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/ravajepisafekudulumow.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202108021906184263.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706827ee185---72858418609.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e39185d7e5---91132916931.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608abc6b40fd4---jufopodujimaxejo.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/54240128895.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/6b9384d291f07319e84599d729558f71/wanumuwezofibivezijajilam.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062008304492.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/34772488164.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/a3f0bdd37331c61e5042aa66d0be5418/fipokaditiwunogonapuviz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ejercicios+resueltos+de+trigonometria+4o+esoPDF 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_off00010d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001257e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257E 22384 bytes
SHA-256: ab4e6ffa442270e7b57e48feb0b22f9c77d0539eebf81e6f44ef06f289f42b96
font_02_sfnt_off00015e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6A 11004 bytes
SHA-256: 0df7b416975651c2eb10ca63ed241ddfe1bdfb243b3aaa3a4664b45a289a0b09