Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24e36035465856e…

MALICIOUS

PDF

82.3 KB Created: 2021-06-20 19:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7c5bf09fb9d2d0ccaeb5c1cf2afb4f10 SHA-1: 2463ec539680877cb2a67c948b00d50075a21c1e SHA-256: f24e36035465856ea9b8f6b5ffa2dc829d6213749da587bc9339cd4cc44f263f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF document exhibits malicious behavior through social engineering tactics. It instructs the user to interact with the clipboard and execute commands, a common lure in ClickFix attacks designed to bypass macro restrictions. The document also contains numerous links to potentially compromised WordPress sites, suggesting a link farm or distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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
  • 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://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607889ebacb91---mimovonefutegivi.pdf In PDF document text
    • https://okna-stv.ru/userfiles/files/473081632.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/64dc4ed6747176e16ce13b481cd553f9/ravuvujupumivepaxemovijew.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/eb3ad159cee8bfbdadd5dec15c602781/75524135271.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/e91b926126c754fe27501b92bbeec4b2/gomifugoxutabiboget.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gfr7ldpbanng64j7v4cnnk0vs6/kofixuzibiwut.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084dcc5de3a2---bixamiraporov.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/nb2oe4l7kqmb9i9p1ha834e844/lepavudul.pdfIn PDF document text
    • http://valeneighbors.com/userimages/fadoxomobeda.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/natizekadaxuperusuxadod.pdfIn PDF document text
    • https://herfection.tw/upload/ckfinder_temp/files/20210618090126.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/rariwanoxeduzaka.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/87da25e184896e0a702bd2e0c070caa4/rutivaso.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b1c92311645.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9j18p07hkh325u6ef345004hv5/rilenaledovomonabifejapad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=dimethylformamide+safety+data+sheetPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 5248 bytes
SHA-256: 7b023fdff6d86e252ca0539a7124e655bc260719591f4fa9f5c39529ab5c2621
font_01_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 10856 bytes
SHA-256: 1404c1693e5a982228ebd60eee3a8d76801769dbab48b99761b9e85b35223637