Malicious PDF — malware analysis report

Static analysis result for SHA-256 10624e10f0811ee1…

MALICIOUS

PDF

82.6 KB Created: 2021-06-28 15:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c1ee74ad2c355733e1ebcbc1338d6b8e SHA-1: da5fb8d00c29da201471be56f772a89b14bde1a8 SHA-256: 10624e10f0811ee1f1da35ba6c1635c23aa7e31aee45b71074e1155f7e796859
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of 'cmdog98' in a URL suggests potential command execution or a lure related to system commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cdb402589---31898777339.pdf In PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/kokaqc705g7tjitm3vu4n7kog5/fiwifev.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/sifoluzo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709af7308a4---gikavobagid.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/nbqc0bmtuag1uu86ao02a2kft6/roleworezizuvon.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a98e5986a---47345552279.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/fce2326438ef7de9b49687d9d6462386/37607340068.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3db44c2b---38455398477.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/17486680328.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/33492526231.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/btmh0u2p3f9trqkka9fl1ndcvs/3618957771.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/215820f83708961c6b25125539ad3d2e/92087145406.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/zifosenakedusuri.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/59fb8886938d658aee41e15b3b661d10/63003385495.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/6tkijchefli1fk67dlvcmdog98/20808903380.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/52712892687.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210523170137.pdfIn macro / runtime command snippet
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1ec9cf5892daf1d1f905d47c4ca9eeab/suvolo.pdfIn PDF document text
    • http://rafaelokazakov.com/file/71058825160.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082fbec913e5---zejigowetaraxivole.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/70281183433.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/43863185634.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/90294151442.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/73099269165.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/f5a4828ceb48955177b0e615679a810d/90259487301.pdfIn PDF document text
    • https://hogies.com/includes/templateIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+draw+a+peppa+pigPDF 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_off0000e110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE110 10324 bytes
SHA-256: 6749b5fe2194459732dca4d97a9d0648bd29587e12ffa6434f36bcf3310a9ad3
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11053 17532 bytes
SHA-256: 2711b53e8021618fd5f76f7c87b8ffc2bbd1e4183cba07ef9395b1d2586b7bf7

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