Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55a8ead92e06097…

MALICIOUS

PDF

86.9 KB Created: 2021-07-04 02:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a5a622714b0a1bdc6db84cd044c7c9d SHA-1: 5fd9c659ff4b867f24b8c9234176593e6249542a SHA-256: b55a8ead92e06097a6c79f21a33cf7908cb63593953af7877b9098feb091bc26
276 Risk Score

Malware Insights

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

This PDF document exhibits strong social engineering tactics, including a 'ClickFix' lure and a browser extension installation lure, aiming to deceive users into executing commands or installing malicious software. The presence of multiple external URLs, many hosted on compromised WordPress sites, suggests a phishing or malware distribution campaign. Although no scripts were directly extracted, the document's structure and heuristic firings indicate it's designed to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 9

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://drafthe.ru/uplcv?utm_term=new+english+file+culture+link PDF link annotation
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c2cbc2337---84745122840.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/legijekofojulidanererewof.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9b67de09---nujomefiwa.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/kilukitazaduvi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0ff64a48ff96f121524af73906586120/kogujebagot.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/midodakepelidubate.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/40b66c4be3789d006d917332aab544af/16116546676.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160852efd49c8b---54914560833.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/rokozawi.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/tatitedunivisozi.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210623190813.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/330f1894ad59fd1ce5951e8acd666b3e/82828146776.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/6800365951.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/kivazaloburemaxarure.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/081f47a750cc798de8bfb5c76b3700d2/lopumusadez.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b568b24e5---16459113180.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/kuwumapuvesafo.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/11062123201.pdfIn PDF document text
    • http://dzbnf.com/upload/file///bezakovubiki.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bf4f7e31a---98327044817.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/kamafidodewes.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d697aca06ea---77589240868.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2evfa1gpvipopdigb7e02a1dd5/jegudi.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/88669903355.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_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 10588 bytes
SHA-256: c751c42ca9782bbea7bec991f950347b974832c3b52ed1a8fc8f94c7215b59e5
font_02_sfnt_off00011f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F45 17968 bytes
SHA-256: 7733e78da7c216308d25afac8bb4cb725f15d01a90a7c2b45e595c9f887cfd2f

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