Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d694b24482d86d…

MALICIOUS

PDF

72.0 KB Created: 2021-07-27 02:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 122534b7b6929710b7f61ed5f94ee794 SHA-1: d184c9a2d31b44c1e5cd449f50aa3fa62a1fe895 SHA-256: 62d694b24482d86de5fb0ccc2f66a39b43463cdd3f96edf732da1e263cfbebb6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a command-line interface, a common technique to bypass security controls and execute further malicious code. The presence of numerous links to potentially compromised or disposable hosting sites further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://escuelasfutbol8.com/docs/files/48094406533.pdf In PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/euh1vge83ujtp2ofqrj1bl3780/85618291883.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/jawugepekuna.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/12133462057.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/16661d2ab3bc39b0195e18200f062d87/95781145714.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/gudosikawa.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaa5dc389b---46710837493.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3cf857793---6387943845.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840ec62d7b1---wodimiwelowa.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/vurulinuduto.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8fa920e7---59187470640.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d0be1253---94939947868.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/siguvazoxebezorizivile.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/13973558916.pdfIn PDF document text
    • https://khanikango.in/file/22351252887.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607da9ce8481e---zefopumirub.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/026aa377fcaf74199e20c2241b1c87ef/lusaxowabobojofoxe.pdfIn PDF document text
    • https://windsbs.biz/files/file/dikikevobonibuwesofo.pdfIn PDF document text
    • http://diodelumi.com/ckfinder/userfiles/files/turugisusemalomifipag.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/18883348466.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/bupivep.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2c65055640138a15846b947364dfd0f1/tozovexosobagebonibineje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=can+i+install+android+on+amazon+fire+tabletPDF 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_off0000bbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD409 14928 bytes
SHA-256: 5b2cc247bdae01707126018d0bde2df246325deb622647ac80270f63e73db549
font_02_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 10744 bytes
SHA-256: 68c1e3c5708d80cc5b00f601976a40b3418a2604b8e0d22640b490570c4c6cd2

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