Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbda2fe9a1b42877…

MALICIOUS

PDF

114.3 KB Created: 2021-07-03 09:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5f0f0c22e8747a8914ed901b608536dc SHA-1: b76aa548ae447def2ae5bfd5b21535f477c06fbb SHA-256: bbda2fe9a1b428773d158dd172e8fe04848bdf5b56958724644b498f52bc1089
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. 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 for executing malicious payloads. Several URLs point to compromised WordPress sites, likely hosting or distributing further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/qtlvvr71p6k88375b0qs53ja00/58242862068.pdf In PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607795d50cd64---wepupojil.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c859955da6---37767797341.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8h18fo3ingbkknj7psuarkei36/turidogodijapaligola.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/aa15addef6edcce578b3a673055d1ead/97455127502.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/mafivedokuzuwav.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210614044731622.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb3402d9a---15621034038.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/r7c5dc3b4g2ol51lrmf8q5a237/69824371122.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/91845750961.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/3729dc1205ade2ce874d126daa68ddb4/deroro.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/iov2p7fhivkb9jks3thmp09s45/70964191349.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/gugaparevekid.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a04e1d769---jinoganadis.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc5b00a3b3---xarovez.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/76896611179.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/14e8d6441c7dccf8c368372f6347034c/44476886283.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/85440047569.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2e4580988734e145257a7e6e056df21f/55437895799.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gosawojar.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/33008652142.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c9f5274f4---pawejimosalejabisugi.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/papivopiteveke.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/71634407234.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a28903b65d8---mobudebafalikoberil.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaf049851d---28516457896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pc+1000+panoramic+x+ray+service+manualPDF 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_off00015a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17218 10996 bytes
SHA-256: 9e5c000ba1e2f724c38490dd126eea445cb0a65af1cd9ee75bcb45e44b2c532a
font_02_sfnt_off00018bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BB0 18020 bytes
SHA-256: 740113d23f8afaf76579ccfb0e52cb3080d04a961f428bfb4e2fd702426d9635

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