Malicious PDF — malware analysis report

Static analysis result for SHA-256 15aac6c4a8bdd8a7…

MALICIOUS

PDF

86.0 KB Created: 2021-09-20 19:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e1608b9254badcc2a0cb3ee048929ef SHA-1: 67beab012e7b0e7bde4ef011953d7cb4a2881df4 SHA-256: 15aac6c4a8bdd8a795767df8a7c86282285a8b3b6115e2a43bf95f2c91001c0d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. The document contains a link farm with numerous URLs pointing to various domains, many of which are hosted on disposable or compromised CMS platforms. These links likely serve as redirects to malicious sites or downloaders for further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://mrpokedb.com/uploads/files/91368207932.pdf In PDF document text
    • http://sm300159.agchost.com/userfiles/files/pitokifaduwarigitod.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/60276881263.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143daee19e3d---sutizojonafumavotukam.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/zuvovula.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/tizeragudomutusu.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/rinafupevezoxijipatomi.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/losamezamogalazur.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/gusoravoz.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/bigukatuduwer.pdfIn PDF document text
    • http://potlista.com/file/files/dazovemiz.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/zezub.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/rewudawovijap.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/jasevanisewese.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613494bc1267c---duwuli.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/28a2fbf2d3eb8b6671972c32077bbf09/73816415676.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/62351916066.pdfIn PDF document text
    • http://fruitsad.pl/images/file/nuvemaforodojadavi.pdfIn PDF document text
    • http://gojjang.com/uploads/files/nadoroxo.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/25101125075.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/melefigepit.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021981228545562.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/xupuzefikadinija.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/bivagalutawonol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=sat+diagnostic+test+answersPDF link annotation
    • 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_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 10660 bytes
SHA-256: dfd8c63acb29d47a92068a9036f0ddfadf6282c9ddbe9ae9a4dd777b4ec37e10
font_01_sfnt_off000102ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFC 18396 bytes
SHA-256: 6e035632a4e680ca4dc1520a4e3563e6aacfa18c54311ff93fa264fc44bd8ea1

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