Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f209cfbb2208ce2…

MALICIOUS

PDF

98.4 KB Created: 2021-08-02 03:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2837f6e3e670bf71299e0d91c82b6fb7 SHA-1: 4e6b99fa4d6860e3c98a4e5cd1d12f8dc0852407 SHA-256: 2f209cfbb2208ce26445f7e5323efcd00dc7a6dd947b32f4969db3eff77091c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, forming a link farm. The primary purpose appears to be directing users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=les+mis%C3%A9rables+jean+gabin+streaming+gratuit PDF link annotation
    • http://cosyromania.com/media/file/45440189553.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/puxudorete.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f97616f5---90761698423.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2b1bc7864---vivilu.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/161045b93c8915---puleneladivokagosal.pdfIn PDF document text
    • http://93564497.com/userfiles/34535987354.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb508d7831---rarafakabi.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a27e16b6e---96237882889.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/7883913e06f1a332f9d2b845c0e0d626/62179914828.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/gakulekeverexazamevamosi.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/jepufoxavagofuke.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bdffe7bed91---mubudodijitukiwuwupakume.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/41416079307.pdfIn PDF document text
    • http://zae.me/datafiles/file/gegetusojivofuwo.pdfIn PDF document text
    • http://immopolignano.lu/images/66395732161.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/659bbda8c4f8588279b8696d4ea227f7/60568901119.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/radibewugakunuvobodofus.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/62958363919.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/nosulesomagowabikolule.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/fofilovokozobuwo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8fb0cb7dc---7406553130.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_off00011629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E40 10812 bytes
SHA-256: 2d8fa22ea278b33821633f7b15b1dd0789b52f28958aa4a4406b1028cfff5c49
font_02_sfnt_off000146cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CB 19868 bytes
SHA-256: 997af82cf48a8eb47f3c2473d4bd3572579fd6bae4652d18b04392aaf9b34f1d

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