Malicious PDF — malware analysis report

Static analysis result for SHA-256 9747c06a34c12bd9…

MALICIOUS

PDF

83.4 KB Created: 2021-08-15 14:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 81495970df205934ad44761f584bac89 SHA-1: 93d4308284cce53318aab351a2076ab7d7b0b7f0 SHA-256: 9747c06a34c12bd90731bfe699afc904f5f0046c40807f4a981d80599112cacc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious payload or phishing page. No scripts were extracted, but the structure and URL patterns are consistent with PDF-based malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://oniceh.ru/uplcv?utm_term=workplace+safety+policy+sample PDF link annotation
    • http://flomojapan.com/upload/files/4151806958.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f6d2b9f9dd43ca247d68709cfa67ba49/mafulefudoma.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/zefaw.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/bobabutevogifabuxakab.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/vifarezexanofub.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fb653aca4---jemujalofubenobegane.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/rezer.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/69af4e2821f72caac6fb7d47240308a1/86561198031.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/dibakamutisireja.pdfIn PDF document text
    • http://unitjaya.com/contents//files/tafubeziw.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/3b932a61a760e219271607bbc3c815ff/67750184893.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d6a5d8b8dc---11186027525.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c98163d89a---16183765728.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/7124254496.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/wutavub.pdfIn PDF document text
    • http://cecev.com/stockages/files/ginoxa.pdfIn PDF document text
    • https://stadion-nsk.ru/ckfinder/userfiles/files/nujogofevopekamugo.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/b758af774507ebdc32d305ce3a0aa5e3/62669610351.pdfIn PDF document text
    • https://argumentua.com/i/file/94273530112.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/06ce23fd6472e27595f3ae0ce2fd61f7/88833390529.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b603619c22d---jejunojokinosetezoxoji.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e54a9802---25346309246.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_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 16596 bytes
SHA-256: a6df2ac3147c1acc1600ae03cac74be82661cc621b269aa2e1dd1150aa85938f
font_01_sfnt_off00010e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12620 10736 bytes
SHA-256: e498cf58c9f943ffe740f5a9eb00e5b0fbd07bb62e52a6a24eef8e9b3dabf916

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