Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0280d676edcc87…

MALICIOUS

PDF

97.5 KB Created: 2021-08-07 08:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9729302f126e2935f4486f65f56a7371 SHA-1: ee1cdef85d6272d734193a631efa0e512a7c5055 SHA-256: 2a0280d676edcc87907f6fd5a2a3de0bc39ba6442779166895eaa608958db079
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to obscure the final destination or evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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://krisoc.ru/uplcv?utm_term=annabelle+1+pelicula+completa+en+espa%C3%B1ol+latino+youtube PDF link annotation
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/2570808445.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/wenipa.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/48455801368.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/cio715m56ibe8gq6f6pct66ot1/51023390781.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/5585f4d0e6d9ee48ab1bc2f1d85fd238/mojamijeporanumesivibafuv.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///90973492410.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/7f212c36ac163067048c811f92ff4b97/65830941833.pdfIn PDF document text
    • https://sce.tw/uploads/files/60cee5bcc5e1a.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061307465673499.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/pizevazeb.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/513a1b78ea5fb05ffacaf588096d135c/xubala.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6235338f37---54561015815.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/22889011857.pdfIn PDF document text
    • http://limoride.net/gallery/file/ralisur.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/73681344009.pdfIn PDF document text
    • http://carszana.com/image/upload/File/88273599227.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/486b690f8f6d2c1b09577b7d3837905d/fapatagififawoludavadog.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c116a95991---20168687393.pdfIn PDF document text
    • https://bataretak.com/img/files/file/gizujug.pdfIn PDF document text
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/pemol.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/6afd889e5ecf36f82a3c32c20e8205b8/xuzusuwigoxutiri.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qp585drbt8tahpcaae5a7ob9pv/11458345042.pdfIn PDF document text
    • https://parkettworld.com/upload/files/41642804966.pdfIn PDF document text
    • http://cwesp.biz/upload/file/40821955345.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BB 16224 bytes
SHA-256: da79484a7f94e028a8871d907a282bdc2df095dfef79f7b1f2af1efeeab75da7
font_02_sfnt_off00011e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E61 11028 bytes
SHA-256: 9632ca3a5e2d2d3e2ded2a65423655496fe872b2a86251cff30c929b43eeb35f
font_03_sfnt_off000137b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B1 19216 bytes
SHA-256: 4f4267d9d4b015f31df703b0c8ebb538d8206b3b01b02d17ff1e8d0d75fd701c
font_04_sfnt_off00016932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16932 2296 bytes
SHA-256: 215c3a90b44bd4709a0221a1719e9383a0390cb48120ee79ff130848aee80844

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