Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3489ecb5f5fe040…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 09:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dab677a3c67bd03e5614ffc14b98b382 SHA-1: e36d8a2e96644e449692d15d576a27a03826180a SHA-256: a3489ecb5f5fe040d469f4fb962a94c63a055b59f9c2a9c938cf3a6c893a7a01
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress installations and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161273ff4853c7---41569003079.pdf In PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/c5a1613eb5bacf22cefef05abce4357a/80154721127.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/32337007932.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/ziredesigus.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/4583997235.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/torisawanemememugiw.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/kadufenamu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/gprrm67caf2fgmhm7280d1it6g/96305390874.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/88176804444.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e7d657e2d0d---1316586813.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e14f09a70---bijebenu.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/be3c1111bb3f9ba49c8b39cb0ca0a6de/30096355763.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/lilowaga.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/na89474kj88mdamp85rsnf1f52/fubarudajamodizofutofap.pdfIn PDF document text
    • http://newcityhk.com/userfiles/xiruzo.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084eb8784689---65899495076.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210723041542_ynix3o.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/372c01b1e1695a542e8346640a4f9e5a/38086921581.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/giparaditupezalukutamuwu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070488d74629---59363904214.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac858a6beb8---vozotufuwiketajigek.pdfIn PDF document text
    • http://temple.mo/userfiles/file/28865661725.pdfIn PDF document text
    • http://chapelguild.com/images/usr/11802153448.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077496f83688---69180913002.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/311db32e49eef6465b7546d31680f799/18962848784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ebook+pdf+numagician+1PDF 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_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 17512 bytes
SHA-256: d764e16c3e20734077ec22232002739052e9191b6d71c98bc45511414c7ae883
font_01_sfnt_off00010c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A5 10784 bytes
SHA-256: 9ad6890515a284525ec85740803c0b5f28296b0a5e40eda20d148331b03e8c90

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