Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78e7ebe2e322c94…

MALICIOUS

PDF

91.4 KB Created: 2021-08-04 01:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c187af4cb74ad652737abb2ccb44cf60 SHA-1: e5bbb24be5093bae3e562f1e0e3a405234cdc60f SHA-256: d78e7ebe2e322c94038ff46e2c63a8bb50d812d11200f14a8e7f27f3ad5115fa
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating a phishing or redirection attempt. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://b-solutions.net/userfiles/file/vovafaragisizegeludarela.pdf In PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/buforisexodufaj.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/jisibot.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a586e759e199f07b72b6cefa42a3aff6/zabapemab.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/xowusenop.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/kilulasuvomegerokexanejo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d97e2648d0---zifumurogajogokesamuta.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/fojanelasenex.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/8862052039.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/13098735600.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/59688044253.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/89101743951.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/34985953983.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/kuxoza.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160790bc864a71---peranuvijowoviluxat.pdfIn PDF document text
    • http://altus.pl/userfiles/file/48271625461.pdfIn PDF document text
    • https://asi-filter.pl/files/file/2833900545.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/9l9ru45u731d76cb500nb203nh/79157368539.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160f668c29b282---35210732378.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/29c25bdb3b85029453d11e15c9a8a98b/2622251920.pdfIn PDF document text
    • https://songhong.info/userfiles/file/69139227065.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/lomivavefalefefanirabu.pdfIn PDF document text
    • http://thegioinoithatcamranh.com/media/ftp/file/rirexajew.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/f8500336a6f8f4a46af61cc034ff261d/rononupumojumefibebetag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=is+ryzen+3400g+worth+itPDF 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_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001184e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184E 17264 bytes
SHA-256: b036dcff1cc586d65df2b3feebc6d0267c8061d8a1fdc1e625e738fdf789b038
font_02_sfnt_off00014548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14548 10764 bytes
SHA-256: b4d47c7e0306df0b58deae6e7e8f94e639812ee48e20967210fcb779c91b80ab