Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0abef0b0d42f109…

MALICIOUS

PDF

86.1 KB Created: 2021-09-07 15:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c5a938b201946111214bbf40b92a36dc SHA-1: 62ceaa7d9d1a9020fb091de9ed2af66af3e9fc93 SHA-256: d0abef0b0d42f10994023994642b8d7ff16ffa39e932574fdeeaae2b37a3e687
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The heuristic 'SE_MFA_LURE' suggests the document's content is designed to trick users into providing MFA codes or session tokens, consistent with credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://nomylo.ru/uplcv?utm_term=sejarah+ejaan+bahasa+indonesia+pdf PDF link annotation
    • https://deniz-sogutma.org/img/userfiles/file/bajuvap.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/94192562024.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928a8b1bdf4---7499354102.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/hrpaj6s04995v3i8iqa6vovaq2/75002452730.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/e1uecelhhl027mpt5v2ic70gq0/92046135560.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210526175234.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1625227417piriwekurinadoxituzegir.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/75788917983.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/witata.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/84949003825.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e8258d78f---92250776437.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d39ded2be2---fofax.pdfIn PDF document text
    • https://12shio2.com/contents//files/pupebexu.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/36866403113.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/73816700813.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/9751855215.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/m09tq6vq695b44ltlhn71ui6j0/91143298751.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/pc5t41jad1m8uepgpqsqu931r1/pipumunavizajefapo.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/fixuzuzilixag.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021062917041073499.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160729f3967e1f---64578124364.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe0080f40f---18283869222.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_off0000ee70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 16680 bytes
SHA-256: 632e0badc1450e3391ddd95845cf576af801d33a84761a912e37013bdddd337e
font_01_sfnt_off00011a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0C 10796 bytes
SHA-256: 1aa56fe9dfe9d3d038983ab3d4ebb661981d3fc719741ab99b5e9914ab22c63b
font_02_sfnt_off00013289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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