Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d97d619062fc56…

MALICIOUS

PDF

195.8 KB Created: 2021-07-19 22:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 719c8d2e573f372cc38dcb86d39cbe9d SHA-1: 1275c35a544abeb33bf235589e117f53f478a4d7 SHA-256: e2d97d619062fc563d40ac81094ea33ec0cb539f6178701750f41f9f65c583de
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains multiple links to external resources, with one heuristic specifically identifying a link farm pointing to compromised CMS upload storage. The presence of these links suggests an attempt to trick the user into downloading a secondary payload, likely a phishing document or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9367

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://suacona.com/clients/16856/File/xobiriwozanizanimiw.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07cdc951b---61786717781.pdf
    • http://ttlh.vn/storage/ckfinder/files/38376073726.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcbd8b58b5.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/d4c576804fdfa949fedeeadc9cc4c4cf/doguba.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609423e27e4f9---86054632308.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/73760922472.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ca7bcf8eb---tigevowivapobabaxix.pdf
    • https://harryfok.com/ckfinder/userfiles/files/wuwas.pdf
    • http://apsencollege.org/test/fckeditor/file/78984608947.pdf
    • http://zetrade.cz/userfiles/file/90328358536.pdf
    • https://golf-tout-terrain.com/publish/page/file/kojusam.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/loq6gl2sl29k1dprhbjrekac49/46001740693.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ee9ec072e---ribixuwemetesefuxune.pdf
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/dotujipiropo.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/ik3ltntcdi4r4sol0e5913f5nu/lelupidigarube.pdf
    • https://anukulagrotech.com/userfiles/file/gogosojivev.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e82f5fda3b1a4f7d8c6873e7f516e9e6/xiriw.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/792l38nv68h79ofi5na3vv72o7/62156200976.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/593a7950da7af1a5b9fa6591f85dcff0/korotaze.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b742ef85f90---mibelelime.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/hkd9grt8fcvhsuhmob2dk3up0n/98314760802.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609920805601a---xitapitot.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/fd1b99a34a45f90eda75ccdab8912ec2/tidov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=soul+eater+characters+blair
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f259.bin
7fa38e7f4f99dbf87cc5cad359549531dcbec677378ddca886464520cc9ad443
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F259 10536 bytes
font_01_sfnt_off00020a6f.bin
3f746c4d1098b43f45670dafc4affd1674e0acf7703dc4d09fec19f4cb97d3c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x20A6F 57000 bytes
font_02_sfnt_off0002a3b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3B8 16792 bytes
font_03_sfnt_off0002bbc9.bin
eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBC9 16132 bytes
font_04_sfnt_off0002d136.bin
c6d59e5af97841272e404186a70c789ac792875e2a09c545d31a265fc79b8d38
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D136 18484 bytes