Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced9ff7bfd86989a…

MALICIOUS

PDF

79.6 KB Created: 2021-08-29 16:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc3155057bafafd4c457db7683aca586 SHA-1: 53c6ea77a36246535ad3fe77de321b29144b8acd SHA-256: ced9ff7bfd86989a245439a585882cf444030f75376ab3ba8deaf08141ae0cf3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://philabc.ru/uplcv?utm_term=uptown+funk+you+up+uptown+funk+you+up
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fe1e50b9754e9f76c2265339fb7f5c3/38360947654.pdf
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/36945819293.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db51f72aee6---vimesifesokoka.pdf
    • http://violetstudio.in/userfiles/file/zowubowazevo.pdf
    • http://apsara.ru/userfiles/file/52790629593.pdf
    • http://edwardlankin.com/clients/86087/File/zebevefifisemiguru.pdf
    • http://dongamold.com/fckeditor/upload_files/file/neligazoguwaxekulisi.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/69985078046.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/vipowagoli.pdf
    • http://hifitness.hu/userfiles/file/69126520273.pdf
    • http://stevis.cz/files/file/nidijepokisa.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/140e7d2d8bc040ef0a8e62ebc01013e7/fawomovefudadikupofogo.pdf
    • http://goldnumber.info/userfiles/file/medogakutise.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/78606840688.pdf
    • https://gaziemirkentkonseyi.com/upload/files/sofanatibora.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/d74884e9056867319f1ff5297273f9a9/dogavu.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3150e8cd30154dde416d77a17be72bbd/46493123526.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610481e998ace---jilurati.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f3404128d---48230301834.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7540f235---1961215919.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/cnaslkrca4mpc0795v7t7q4fna/tefaxobimegawunetamexeve.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/14o9tf91br8uj4jomm8av8h3lc/jipudunipiponiw.pdf
    • http://bmcnx.com/userfiles/file/vuxaderizejojujugole.pdf
    • http://svaz-podnikani.cz/files/file/burofurinefivomi.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_off0000d334.bin
009e2fda99cfc26a2e9e3ca2150298bc3011e543667a574e2be9a7ef92d36128
pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 17612 bytes
font_01_sfnt_off00010123.bin
7ddf61d205de773cdfa479ce4f3a34410053aa8b73fa26a3ed951864f3d1ff48
pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 10052 bytes
font_02_sfnt_off000117b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B6 16792 bytes