Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bde592d5506c2d…

MALICIOUS

PDF

86.0 KB Created: 2021-09-08 18:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3630b4c76de0858e030f9395f032a1f8 SHA-1: 707f2f4d4c5eb8f2d21e5412df171bcd2c538b3f SHA-256: 47bde592d5506c2daa640edea82bd58123c0e19ed1a75d6ffb94928106bf68ea
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains a link farm pointing to various external PDF files, some hosted on compromised CMS upload directories. The ClamAV detection indicates it's a phishing trojan, suggesting the primary goal is to deceive users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://virker-ikke.dk/files/10341267400.pdf In PDF document text
    • http://geobigoni.it/userfiles/files/sexatajagije.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef74661f62---datawusilife.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2b68ad23c---43134204344.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/taxuvifabavesuzoreroz.pdfIn PDF document text
    • http://hflchw.com/upload/file/20626101885.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/gunifupodowigodorutobi.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/fanixadanepexekipulil.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/movofosominerepo.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/48672965189.pdfIn PDF document text
    • http://africareview.in/userfiles/file/671665077.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ebb3d5968667372c27180c2653bfbe5e/kudanorerus.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/65131879084.pdfIn PDF document text
    • http://boldogelet.hu/media/poweve.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/donubasev.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/biferena.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/jamamepaxiwigudanogazokez.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/ganoneravepefujagal.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sadixobex.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/52193952422.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161386cedf3a3a---46733605130.pdfIn PDF document text
    • http://www.toptehnik.si/images/nasuxefebezokivujeruw.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/jimuni.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/78620973675.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/jilidejiwuravane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=evolution+of+world+wide+web+pdfPDF 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_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 10536 bytes
SHA-256: 4dcb55b1259f8289d6ccefd2ec6a4e0b19b682c5a5a68f5130b831a6f01a51dd
font_02_sfnt_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 18812 bytes
SHA-256: bd06bdeea93273ed1754ba9e82d4a499221055de9e4064a1bb1a41c1af6c3e36

Open this report in the interactive analyzer, or submit your own file for analysis.