Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9616ebe2b9fad4…

MALICIOUS

PDF

94.0 KB Created: 2021-09-04 01:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e5f065c9a6e05ada82c5800bf9d9c785 SHA-1: aa31b049dfc4d695fc5b9e44b9123d706580847a SHA-256: 2d9616ebe2b9fad45444c34ca23018718fc954aa60c4b1eecd292f4ab1870e49
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=tia+portal+v13+manual PDF link annotation
    • http://kyea.org/imageuploads/rolot.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/jinumoli.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/mapanefoxivetiravug.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/divogaposavepalajizamaf.pdfIn PDF document text
    • http://splogservice.ru/content/file/21314995096.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/temojonexevavasufisofaf.pdfIn PDF document text
    • http://89928386.com/uploads//files/202108070620188903.pdfIn PDF document text
    • https://flying-vikings.net/UserFiles/file/50468040976.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7501d237---jozav.pdfIn PDF document text
    • http://e-district.org/userfiles/file/21144623079.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/623b4d24db54979e62aed332c0260c50/geralob.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/45047154890.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/76902496562.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/43387270471.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/xuzesaki.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/fizuwepapadepow.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guweniboxikoma.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c61cf17ba4---1623777987.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/27389690647.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8fd8605ef---jiralexanunim.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/89bed7e62cf0058beb5eb87cbd1e8375/74527052850.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 22736 bytes
SHA-256: dd8e39c000b552f05a8ecb9c2effd7a2158858bb6f90d5bfcd353e750f9384aa
font_01_sfnt_off00013acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACF 10468 bytes
SHA-256: 806c74a0631f99e6bcbae7dc1a1a9c82cc6daa2b245269335c82c006870dd25d
font_02_sfnt_off0001529a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1529A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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