Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7cfe96e15385b3…

MALICIOUS

PDF

91.1 KB Created: 2021-07-26 09:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5b94e7f49b0079fec241e564d7c64f4 SHA-1: 3d065ab9fa2e94dd04f308bd6dc163aad635e704 SHA-256: 9d7cfe96e15385b3559d2f38c42106b6bd117f336be25ebfd83d46627d1975ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/lesepojaja.pdf
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/kagugijofiripinezagik.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e5b0777a8e7---81439814893.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/2ec8c1d520faccfd7bc8958d4111b088/mobilageledujonazipi.pdf
    • http://pamat.ro/UserFiles/file/firogur.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b906d2914---67812976536.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c767564f2b---guniwuzema.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd106cae6c---tolevopo.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608503c032f84---zumoxidoji.pdf
    • http://royalgoodviewresort.com/Uploads/file/gupoviminobag.pdf
    • http://kistours.hu/userfiles/file/famikowawidima.pdf
    • http://amirafouad.com/uploaded_files/file/badekebezaxom.pdf
    • http://hi-techfiber.com/userfiles/file/vexixinirataf.pdf
    • http://historia-bfured.hu/userfiles/file/50532128158.pdf
    • http://sarljarry.fr/userfiles/file/jowuduketigufinapepaga.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/8d365be07a59f231c8a049df337f74dc/nodanojufilum.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/bd068f331db0cb4d5c625ac765546bd5/jilesawewobonipija.pdf
    • https://havadisname.com/upload/ckfinder/files/rupoxowax.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/a8823552e12f3a5e50556777143fd2d2/kigudomi.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/c0751b764fb8adb5bcf901c008f3d332/42313806494.pdf
    • http://cortabellanews.com/userimages/64409129743.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6f2458c6d---gonoduvuvoxulomave.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d387ebd34---kinefi.pdf
    • https://aulacvn.com/upload/fck/file/jikujonisapeg.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+stop+knife+crime
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010162.bin
1fd2e266408609664abd1c503e2484c828b9a3bf1b37377ea48b17e762f4742b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10162 17292 bytes
font_01_sfnt_off00012e2f.bin
b3f412433395041636b813765b8a2bbb6c5f3408b08a01de83b307229cbaeb2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2F 10604 bytes
font_02_sfnt_off00014679.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14679 16792 bytes