Malicious PDF — malware analysis report

Static analysis result for SHA-256 465069e687577528…

MALICIOUS

PDF

71.8 KB Created: 2021-09-16 17:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9ba5bf5340b2c86cd8d497cf6bfacc29 SHA-1: 869a86a3b545c6bcf3821f10d28f77ff798a5b0e SHA-256: 465069e687577528072dc34641b3f6b90266c40082de1a4d3b52bf3c144381c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to disposable hosting and compromised CMS uploads, forming a link farm. One prominent URL suggests a lure for 'after effects cc 2017 torrent', indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=after+effects+cc+2017+torrent PDF link annotation
    • https://tezerwatch.com/file/upload/files/09-10-10-19-52-65.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/91701708217.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/dodokesixokiwipuronagori.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/28254883685.pdfIn PDF document text
    • http://allycatering.com/userfiles/borifisijanu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16131f8e238f68---fanidanapafogimorup.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/11/rikobadatuvefegewamo.pdfIn PDF document text
    • https://emenu.hu/editor_up/11785419895.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/fefakigoduponobatom.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/67138498671.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16140f41a7080a---10455119794.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/81894368952.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/88072679345.pdfIn PDF document text
    • http://katela.net/userData/board/file/40543388831.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/47fd548204c463d43360c25c7ab41642/93692644723.pdfIn PDF document text
    • https://adci.vn/data/upload/file/zuzulugupukeponoj.pdfIn PDF document text
    • https://sitarasign.ir/data/file/mukizisejonelavuwiwuzik.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/sigagetavutor.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/103540c84e27a374621dbc3905a65cb7/fodasixipabekekegawivibil.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/4330856828.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/87871563126.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/41331354620.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/bulodarisigu.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/341305410613f9198d4bda.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/69264024264.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_off0000b6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D6 16512 bytes
SHA-256: bbc43af0402490245a86aa836d3b97660b8257c2c518ecb5f9f3b5177bfc97e6
font_01_sfnt_off0000e16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 10352 bytes
SHA-256: c7f6da3cd30d9ff2f7793a3fabe2a92e867e65280d31199ef7cd1922b24e103d

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