Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ed02e8aeec30f3…

MALICIOUS

PDF

82.5 KB Created: 2021-07-14 04:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 179ccc233f5ab744ad75a6929086c418 SHA-1: 8af04149c6626cc1b6ce2ffc1a7cc0846fda33c9 SHA-256: 25ed02e8aeec30f34219ef650a02363e802fcd60787a0f2fedbde5369c2c9b34
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm directing to numerous URLs, several of which are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://monkey-do.net/userfiles/file/75554980555.pdf In PDF document text
    • http://learningkey.org/userfiles/fivejufixubolefedokisiki.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0957b6c78---87819670013.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/nekasuragixitulemafedax.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ddec65070122f3ec9db474a77eb9f664/32472931167.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085049ba3713---1260114748.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/rurajupufumelajonuri.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9c634484e---guxefunopugajag.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcdaec2cb7---taxogejuwitalot.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/0deafccd0775dd391c15d6289d3143d9/90144363594.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/87013189083.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/38690229809.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a232fabf041---fegowo.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/35959653124.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/68387806729.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/rizaluvenepedu.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a43ce3b5f9---bezujadebawar.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/bofon.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b46ba2eb8---zuwanoxuvuminomifires.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/73591288979.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/94917558224.pdfIn PDF document text
    • http://epicridesnepal.com/files/pabarukivikisivifolubaj.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/karusenaretovozido.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777ed06a739---wiwupasoluxuj.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/922278eeb7d92e3b79d9dfe6244ff90c/32622652782.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=blouse+neck+work+designs+imagesPDF 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_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 10948 bytes
SHA-256: 15271c1f9ebf4d2ba5bf6480adfec284b286762e1a1bec84350ae8841f97ae2b
font_01_sfnt_off0000fb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 15960 bytes
SHA-256: 243b836a996a02b01de514a4ff4078b4a9f733395595bc473e1a5e97b39edbbb

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