Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c8ab8073ab5978…

MALICIOUS

PDF

71.7 KB Created: 2021-09-03 20:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 194929d48954ced22ecd3169109a0e4f SHA-1: 935e818829f8279f0c94794a88aeb934a86d7755 SHA-256: 29c8ab8073ab59788afd4a818a9caf10f5e49d5e7c1a006e3dae93fa3cd4042e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of embedded JavaScript indicates an attempt to execute code, likely to facilitate redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://controldellaves.com/app/webroot/arxius/file/silib.pdf In PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/89139419769.pdfIn PDF document text
    • https://aromamarketing.md/img/files/15521867763.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/96362cd5b11631215f22dafbda68c36f/pemutifaduduna.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/eaca600993e906a8795aa70eeeab9689/gepixajadejobobutax.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-7-31/20210731211441754364.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8198669ad---55265778522.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16097e1c0536e4---27140235900.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/icdic0p4op0qsklpsaipji6pe0/64873058091.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/kapadimefakalatijemavibe.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/13155390306.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/g332pj523bnucti23pnf95vv0b/27647787298.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/04f331fc37f05f10a7df07d10906b062/40800161569.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608caaa29ba9d---8125274115.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/56249554232.pdfIn PDF document text
    • https://iwistw.com/upload/files/65096762086.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/88060086235.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/sipudetadesa.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021051606442162.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/72537904943.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/tarireveta.pdfIn PDF document text
    • http://telektrans.hu/editor_up/9569071498.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/77491392766.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/64718589895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=derivadas+con+funciones+trigonometricas+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_off0000b7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AD 11084 bytes
SHA-256: 60b49c8234658ba88204cbb4a2aa78758865e955e985997a88fea76ef16b1392
font_01_sfnt_off0000d156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD156 16168 bytes
SHA-256: 0e3dbff0151ff1d3900b22c3f0a26e0284b25bf868bdcb2b6cf1367ffbb80b8b
font_02_sfnt_off0000f8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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