Malicious PDF — malware analysis report

Static analysis result for SHA-256 682fd3ade36f454a…

MALICIOUS

PDF

84.1 KB Created: 2021-07-17 12:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 85608e81b102025cad3c70f92a858f03 SHA-1: a5759ec370724a4138390ba9a17981fc3b15a073 SHA-256: 682fd3ade36f454a314ec65a1eb1448ea37b3d9f62a73b1343b2829c92c2e510
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. The presence of numerous links on disposable hosting further supports a malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942fbc9b8c8---43918652202.pdf In PDF document text
    • http://baigeleather.com/userfiles/file/tivinekiruvof.pdfIn PDF document text
    • https://electroagro.es/pub/files/94546395507.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/95868090797.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160985fb39652c---nasaf.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/6bls8p9ci6rrp0v5r2engmmae4/38615580769.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/82354000294.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/81902356621.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160986549c110f---lofapozamofojegateji.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/95631284205.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/voranutanafodazamu.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/mowigesuxada.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/zawiwowovonuwiz.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/sctg4f9pphl97noc8u1du5mtd4/53687535077.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/81053530501.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce26c7ac5e---naxabemevilulofol.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/16e55fd78b79678dc380eb81c2a4c39b/fotijajigapulumer.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/niwefowabem.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/32731991845.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb697b3885---32374643622.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/ronixanokovotemezetataxov.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49164c07b---64546394040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=minecraft+word+bannersPDF 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_off0000e4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DB 10644 bytes
SHA-256: 71814fc4d3e6341bd5ff2f1b39415e52cbb537d246679ef03d929c46d6937169
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11581 17416 bytes
SHA-256: 0579a2c7df7d3c46b63dc7c82ffce61df5e2a65d400bb35d90b6d4457d8ff262

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