Malicious PDF — malware analysis report

Static analysis result for SHA-256 296ad6415aa6ae9b…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 15:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09480ed34a1e53fceeeaa2346beb1a09 SHA-1: 8c256a63da69db33c465b3ac57c6f2cf5b968327 SHA-256: 296ad6415aa6ae9b934429e5978876dca7cc64a375ccda66860f4d2378720a3e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b463b29c56---wotirepikodapipakuv.pdf In PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/sexedowiropizululimeso.pdfIn PDF document text
    • http://salkim.com/userfiles/file/45004081912.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tnu02p6mgrn5sar9qfofjc3p72/xeriwigoxufam.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/40638872758.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/57228819038.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5dffb35ebc---49817415425.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/94146118465.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202108260954378876.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/somobopavalixavidutiwub.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc347f40d8---74391240083.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/80841663410.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/69227140489.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/35566995086.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d02028366f1e88160993ce696c325872/56836533825.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f93a4a1be7---jijawapiwese.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/lusinop.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/98689903807.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/u00lbfcnsouiokvn1fer2m2ae6/budulom.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/puwimasigib.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/33896409787.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/cb69720e7fb67ddbd34b8f3e2b372740/mawetakubika.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/vemunubumufeditov.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/nigoguxufatarimu.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/jimoxijabujalelekela.pdfIn PDF document text
    • http://emannsltd.com/userfiles/24579748920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=solid+figures+worksheet+4th+gradePDF 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_off0000da9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9C 18260 bytes
SHA-256: 5b6993d984cae183eb16a53591bad2d846ddbcf7caf328090fa78126564e1b59
font_01_sfnt_off000109b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 10960 bytes
SHA-256: bb81a5ee7880dd17d2a06329c580f444a3cc3f038d4eeeb4f338b8e7319a6634
font_02_sfnt_off00012327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12327 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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