Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd2f5b997458d48…

MALICIOUS

PDF

79.6 KB Created: 2021-09-07 12:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0181da86723a1e1c4ae85d91853c0484 SHA-1: 5bd805e3385c5392352c7074664091a71e422a97 SHA-256: 7dd2f5b997458d48d812fddc981e233a4f8d5839ff146e7024ee0eaa6b16b6b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://huntic.ru/uplcv?utm_term=strategic+human+resource+planning+pdf PDF link annotation
    • http://www.cddfct.com/up_files/file/mitibipozeronab.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076829f07e05---97319245966.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/zuzobobunepetowimufozox.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/11009810138.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/93691581124.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/76825219592.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/rojajulogabexub.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/gekirepapenajegugat.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/11482232218.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/87936510397.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/26e25c5036bc05f81e00cdc9e7bbc426/92679191652.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210812_E36390A8EC3FCF30.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/bavasagixufevajedawurokuv.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adf19525148---ruvutomixademazamedu.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/91ic4tdhc5md43er4sqmt8otev/wugusidulodiva.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/medaxukokebodijomizu.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/xovavudevujuwawosufo.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/cba06edba881e1063e081733249df4eb/76355504776.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/20465737330.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/levovibexoboxo.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609495a5483c0---salalosem.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b28f286c---judapuketuwarumi.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9443bd3ec5---wilinebotudox.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_off0000d4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 11244 bytes
SHA-256: 38181c8197b59471281d94d07118474012d23831dc1e21ce208d43fc0a09d0cb
font_02_sfnt_off000106e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E5 16208 bytes
SHA-256: 0d3cd57877bea44b3d8d612dab6220cf0c80d2a0708f1408d8b9f4642c0b00ba