Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d055d400e58219c…

MALICIOUS

PDF

85.6 KB Created: 2021-09-16 12:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 92c9a3e037ef3e2603475e1e5153204b SHA-1: 38b284b245852bfe7b390feb66db2f96082fe26b SHA-256: 6d055d400e58219cb097b8fb919c340acf88261660b3d915bbcd937626833f2f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy and paste content into a command-line context, likely to execute a secondary payload. Numerous URLs were extracted, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://inwebjor.ru/uplcv?utm_term=how+to+play+multiplayer+in+minecraft+mobile PDF link annotation
    • http://cnhhgj.com/upfiles/userfiles/file/mumobewemebomufexebebunow.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/gumepatemuvetujowep.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/cidaq7lg2jbtnsrm6ilfra1ppg/63064573014.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/lebisuzuroxujelade.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/tumefekodilobifi.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/sarabowupan.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/jenimavowamisivupexo.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/muzuduvipifowibugixibukap.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/151402595956.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/xinuxureneforozuzikewibu.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/delogupusaxibanaji.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/vlr9depauqqcjdm473r5u4u5fc/buremipowixin.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c9453513922a3fd5edf0b16cce2fc324/kafowudakilaz.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/23907840356.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/9bc4ad29eedda4c33747b1715c36e9fa/41534597779.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/lexopabomiripu.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/93256472082.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/tuzogu.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161408f333ba22---34724847822.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/99885608016.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/51399303538.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210906150454.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/90200981512.pdfIn PDF document text
    • https://kaimano.it/file/45476699777.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/88717854742.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001028e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 10904 bytes
SHA-256: 79a4e225e9cd1408a8dda688f3da5e2e5a0132206754ef5ec5980a605b2767c2
font_02_sfnt_off00011b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 17220 bytes
SHA-256: 77cc19491c547d7456476cdc87110708d6fbc68d55fc6236b213807d2a27b039