Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6cc78e3a646456…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 21:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 35f58a4e69398fefbd41df3d553586e8 SHA-1: c0eb50c6a44e373be4e325133b604ef38d1e24cf SHA-256: eb6cc78e3a64645688e3106cdc0ce384416743e950125a65559471d421a8ca6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content or phishing pages. The presence of embedded JavaScript, though not fully detailed, suggests potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://coretry.ru/uplcv?utm_term=how+did+the+declaratory+act+affect+the+colonists PDF link annotation
    • http://aisef.org/uploads/userfiles/file/file/loxaxoretibosukevafuw.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ki0kjl9v4fcg9qpkv7nl74l38i/73914771747.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/ce4e8a1a8d38a1805a28f676f5d8f060/lidalizifoxuxizibobire.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/duzazuridose.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083409587c5c---37799076227.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763569662e9---lujejuxegu.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/9866454429.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/2ac23d5a424e00d761562cb1f055c626/3444534273.pdfIn PDF document text
    • http://axwelindia.com/uploads/93905675189.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/cbf73ca75bb2e3b3a0d903dfd1d3cde6/24831527366.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16075da43bab32---jupiv.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/kemolemusisonagevokupige.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/affc48d429d8d7482e4605300867ff54/91273877247.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/fozodimenakalanuxizakita.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a56dc8c0b80---lexigibuxamanakatabupepim.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/1fc641cf1be0efa0ae25eafac3b1ec35/rolekazenerajibetowij.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/bovarevijuxezafosikavet.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/75180274497.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e61c708e7---52561585886.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/40770262439.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/d7gkgco2bcbcekkqebrstehsbe/85620910868.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/tuwamotopokiteganal.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8763bfa96---moxiwapifefowogejatojifot.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_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 10764 bytes
SHA-256: b6397a4144842d01b67eeb2b719f3ddf7b509434f2791a31f91d548682c08f87
font_02_sfnt_off00012174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 16592 bytes
SHA-256: 15999664b8ddbeb005cb5df18a360ca07d89818e7bef7110b94a0df8671d7c7a

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