Malicious PDF — malware analysis report

Static analysis result for SHA-256 e869c4602d4ca326…

MALICIOUS

PDF

71.6 KB Created: 2021-09-02 02:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 21416ea9d8aaa065c35371ce65c85bfe SHA-1: ac3ccdc870769f8b8449855dee9d9443e7ecd906 SHA-256: e869c4602d4ca32646d9faccec7e5c9f44a45dbebbf75169ef652ca60f31326f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for executing the redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • 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://birnagarcollege.in/userfiles/file/lesej.pdf In PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/rdm3qgbi9o6psqe0sd4qndn553/6760834386.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/16070957826.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cb79b67db---tikipud.pdfIn PDF document text
    • http://hotstamping.pl/files/file/givasulutigipuxafu.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/poweviwo.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/7c0ac4dc87e4fdef91834beabd7ead23/nizaniluradetodipiw.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/83903947989.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa264293d7---66830982553.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/1o6cdtu59g90790d6kjd8iaia5/xobuxejobeg.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/71508894852.pdfIn PDF document text
    • http://www.asslar.de/downloads/xedisewepagisor.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/molodixit.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/14223327856.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ef2099e9---39379578974.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e082a1647---34053511948.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/sogulidubotapupaseba.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/filuxorizejovegerevosoki.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/4dge0ujff22k7jt1odmpcfsfq1/dijoloboru.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607db8e939cae---94955082261.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/vmbn016esc8t4084rbii5tm0e7/riwelapanabifabi.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/67068434170.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/76929974584.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e00aea44cb6---91484304654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=words+of+wisdom+meaningPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/85086332564.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD209 15088 bytes
SHA-256: eb7e2a05176f3910f1a5be9d416938c8c8ccb8d5f65ad94f517d38edd0a54786
font_02_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 10632 bytes
SHA-256: ddb781d4d0e9fb3bbe127022acffe59645cda88ed3bc18f9e35b66bf60f0401f