Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00ab469315c89c6…

MALICIOUS

PDF

80.2 KB Created: 2021-09-21 04:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9344d28f046511ac579511e31cae29cd SHA-1: 88358b8e446f4860e390e2558a95083cc34d17ed SHA-256: d00ab469315c89c663685c7c6764cec67e5333ba643d8a38be32ce9e8038cbb0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous heuristics identified the document as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drafthe.ru/uplcv?utm_term=animation+button+android+studio PDF link annotation
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/nusibibex.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/89530487380.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/vadawazovufaxuw.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/29025198891.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/12529078967.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/l94urc6a7nh3g4agrgg3in9ecd/44873415890.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6a00ab084---jenapepunumumamelani.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147464a18834---63827053297.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135abd2a5b79---finogitezozafagogow.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/xopulalaja.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/63597198561.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/dofifumare.pdfIn PDF document text
    • http://hoangnampte.vn/quangbasanpham/app/webroot/upload/image/files/27856087097.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/xikisusewebujeselesenusu.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/82129916149.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/36529699636.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/sovimak.pdfIn PDF document text
    • https://koratspring.com/upload/file/sipuverufufub.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210914135947.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/nawunedoxipisukar.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/84404205120.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/newokuvosusej.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/rigutijapinobiwofosifuxo.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_off0000cb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 21968 bytes
SHA-256: 9397173e957c4a39c1a5a8add96331bb9da50f3d2c34761bbdc4faf8b22e4d8b
font_02_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 10452 bytes
SHA-256: c2ec330cdbc1a9a3ff27fa46ea8a73981ed711b4795b0c697b2b5f9939575fec