Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eb89e28f9e789f…

MALICIOUS

PDF

91.2 KB Created: 2021-09-07 13:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7320d601a7d6c3dbdabc1c4a4dda2b79 SHA-1: fba37e4d083febc441251bb0a1d3cf9f5c8ea0c9 SHA-256: c6eb89e28f9e789fd736ed0a557c7a7b85e7b4ca1e91ce1e4c99c01b5d907bc2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/re69t3k80i2ih3fp2omgkgoc44/80649625341.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a5c3d9200144ce99a33f321cc0ae7e52/gizurifu.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/zopuluxokem.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/31980523957.pdfIn PDF document text
    • http://come2menorca.com/images/file/fadaxaziro.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/daxorosibefega.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/71837773293.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b7df7dfafc52bcb5114cf968fc6f7539/25835046818.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/8e53a4a4da072836b916cb93f840e734/xuxonarimi.pdfIn PDF document text
    • https://wagaskar.com/media/mipagogiludaweruvedevas.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/98596687922.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c5d385e55---47739628716.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888c05e4a16---fopej.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/87dfddf56f3b27b89ecf9e6c372804da/50869019560.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a238ad898---14913874540.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/76805177180.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1625692288.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/lefo34l37fq5vs9t7ft2tsd2fp/davutasawusavikabolifi.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/56711810703.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa720d24d30---kawedavazokanojojomu.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082bb857520f---wosuzimurogoni.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee51811aaf5---18598577863.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/60029938966.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/disokoxewojabete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=terceira+idade+e+atividade+f%C3%ADsica+corazza+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_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 21164 bytes
SHA-256: 57db6ed90152e8d8cd5009a1bf80b4039c22e583740de2b04a7bfc5624b27f38
font_01_sfnt_off00011a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A61 16292 bytes
SHA-256: 17d43473368562fdda188ce5f65d7b5dc81a1403b3bdf8d5b553b575dddb04da
font_02_sfnt_off00014420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14420 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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