Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cb30c6a33b5482…

MALICIOUS

PDF

81.6 KB Created: 2021-09-11 15:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 097c123ea6bebb7a5e7f6d4e0c28d1e4 SHA-1: 1910e9331299a5fc3d6d7ec9442c632178fa931d SHA-256: 06cb30c6a33b548275009c06feac74d069c3919868cc272d9b03d5d9b6309136
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure align with common phishing and malware distribution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=android+reset+app+permissions
    • http://abwmechanicsville.com/uploads/files/bekegazofunedijejovazizaw.pdf
    • http://brickchamber.com/ckfinder/userfiles/files/tobaxafufetifido.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/zubunadutidoro.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c1db8b595---faraxorugemudedigefajatal.pdf
    • http://cellesekorea.com/ckupload/files/15036668088.pdf
    • https://onecre.com/images/content/files/97018556521.pdf
    • http://mcap.cz/images/uploadedimages/file/2286192822.pdf
    • http://artospace.com/pics/file/vejotipus.pdf
    • http://whkmradio.com/userfiles/file/vebitukonafomulalam.pdf
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/gijowu.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/farinubujo.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a57ccb8d299f4729c24e20bed745f351/56295546010.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16132a5af68f37---66212803303.pdf
    • https://tahubunting1.com/contents/files/71019303776.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314959c98b6---vujifadi.pdf
    • https://ever-progress.dacola.com/upload/files/95252829011.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612f199d2015a---buloserifun.pdf
    • https://fenicia.uy/fenicia.com.uy/uploads/files/16125378099.pdf
    • https://shellserva.nl/docs/Image/file/43241100806.pdf
    • http://ge-mak.com/files/33430172801.pdf
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/nugures.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/68828836292.pdf
    • https://brukspec.pl/upload/file/12029817985.pdf
    • https://0900107678.com/upload/file/xefetu.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137294b8bb98---mumafosezatimewaz.pdf
    • http://airzo.net/userData/board/file/23489632617.pdf
    • https://lufty.cz/UserFiles/files/63839730295.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7D 16792 bytes
font_01_sfnt_off0000f48f.bin
1dd1e1f8092507821205969294ebfd04b651141359ef15b8b8b9ec66c4b63265
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 16912 bytes
font_02_sfnt_off0001207d.bin
c3f6f596e4a97e2a466f019b61d5139ebd6b83d2c80941ea7227ef39f3fad87d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 10488 bytes