Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aad28c96495c574…

MALICIOUS

PDF

79.1 KB Created: 2021-09-05 16:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d5ea3e364a101213f5ff8e2f8d82d3ff SHA-1: 0b87accbc7ce44d37d47f367c04daf4030527ee4 SHA-256: 0aad28c96495c574e37334c69897ced89af1bcfa0ae6e6e77ae364ff7f7a7361
204 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple external URLs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, a common tactic for executing malicious payloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=back+flashover+pdf PDF link annotation
    • http://thedreams.cz/files/21591441187.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/ec61a63ee0dd06d9b321a1c64f7535aa/33726267952.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdd07e67af---63418383755.pdfIn PDF document text
    • http://one9five.com/userfiles/files/tomebamoboj.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/gexir.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/90824a3af2b0cdb49dd7b439a65711a0/40296965594.pdfIn PDF document text
    • https://ewt.cz/res/file/79216052700.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/ruguwititobimobugidivakox.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/33742877468.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/xefawowotisigavuzorigik.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076be93a9e7a---mexozowagutejaju.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/49208163610.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/rugata.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/pakis.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5200039ff1eeb2a1da49fc5dbfa86ee/nadajepux.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/3e5e220bcc2e18775c31837257fcf34b/pofawovonovisoxulave.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608db099c27a1---najekajex.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/tedimenolarerupubiwupa.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5226b533d---98799183616.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/guvosum.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a02ec837713---kulipewuzogos.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/xipobiborusesufu.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/tolapelutegatusapepu.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/12495205953.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_off0000d000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 10636 bytes
SHA-256: 540a7facd5b2c55a68b2447b2ff697ce6e3a8da896c1a06e49ece69aad6684e4
font_01_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 17868 bytes
SHA-256: 10795cb5816e8cafdd21fb9cae243bdd5bc9c8a56d310df2cec9aeeef8809f80
font_02_sfnt_off000116ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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