Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daeb0b26c53fc4e…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 18:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c83c39916da65d05dcdbe8a99cd80518 SHA-1: f8e7a8bc565a5801af6409e5cbc38f7f14afc8da SHA-256: 3daeb0b26c53fc4e25c826f2f729a1448ac188e4b4b2b3719e4ea5b42902f6bb
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, likely intended to lure users to phishing sites or download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://superlitefan.com/uploads/files/wusumefemokugif.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4afbc29c2c69772f8db3687cc40d8d62/40418053372.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/6f6a255f8b7128d8b7dd2babad4bab47/84266272009.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ec86a94d4---nomofelojabiful.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/45aaade64afe5e06c9c4dc525ab91999/bukasabuw.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/ginisesegugu.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15ce8ca226---93442021897.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b61cbdfd05a921fbda08f0606346c1e1/vovigaxotuguguvupu.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/goxogusijexuxogepufu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ca32ef08e---62454446065.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1904152e0---zosomorumemodemisivu.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/mivekajafireludeneni.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/papogapitirewew.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/tazitabumapilowuwokasepa.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/wugobepasiginut.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/78527836015.pdfIn PDF document text
    • http://ubest.ru/images/file/1150451019.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3671ba0c8f---42326373091.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88b2372ea---vixorelojefabelamuso.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/5ksb9kcqjn182p36na1f869d97/guwedipi.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/fnd16rqgriq15itqo99t81uhm7/99538269112.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095827b856ad---xagipalawuximikipusokim.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/2411029438.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/381456724dc8a18b4cd43fa21a1588c8/purulowawamoxugodin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=fundamentals+of+management+8th+edition+ricky+griffin+pdfPDF 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_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 17776 bytes
SHA-256: 2c20cdce23b6b1abd716f3bc618cae629da56a5763e3548a7bf73355b4216050
font_01_sfnt_off0001218c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218C 11556 bytes
SHA-256: 495fb0164cd0f8bfcca136f779425eaf66be35f2ca4e2f18762c05e0c7c1f370
font_02_sfnt_off00013c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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