Malicious PDF — malware analysis report

Static analysis result for SHA-256 361435d84f0094de…

MALICIOUS

PDF

87.8 KB Created: 2021-06-29 00:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 60c78561c8472b68eee0f4fe35e6a651 SHA-1: 4812ce94a520b3234fc6539e13be2b2216c73ed5 SHA-256: 361435d84f0094de6d2545fde1d85e5cafa569ab1a2321294e8c27b17b65f9b7
236 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to potentially compromised websites and a link farm designed to redirect users. Notably, the document employs social engineering tactics, specifically a 'ClickFix' lure, instructing the user to execute commands via Win+R or a terminal, which is a common method for bypassing macro restrictions and executing arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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
  • 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://lamaisonducoeur.ca/upload/editor/file/munegumiboxikevibovum.pdf In PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccdc93ab34---gidadimitijeb.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/85870262933.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/11904323530.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/bimizisajoxugedepumavawij.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/26680607803.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a79361dc09e---49154716938.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/84371340886.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c771d0cdbf---23493498499.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/wavalowuwobavorufen.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/83044348337.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/82ua2kg3siei2pkpr3p1eao2g8/82845920892.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/komisowemux.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a07cbd55854---xatiresugologokib.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/60382047051.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/jofovademirodalazokuvo.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/11755780359.pdfIn PDF document text
    • https://airshow-bg.com/file/dilawudajevipuvatodafo.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/5940664211.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/6gtpujollkcn3bfotfpec0aip8/lorevif.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/55749071917.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429151516549941.pdfIn PDF document text
    • https://medtek.vn/storage/file/tozowir.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/ba7c00f83352025b0084128f2c518bae/pozazat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=1909+iso+downloadPDF 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_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA7 10240 bytes
SHA-256: 8a005bfad56c079b5367bf20bb1e9df5ba711b273938d01fb49591d7b23b68b6
font_02_sfnt_off000125cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CC 17072 bytes
SHA-256: 8c2239a83d5450c371d8f04b92e76fae5540349710fe76c317d18fed5e26e535

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