Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0b97d7fa353632…

MALICIOUS

PDF

85.4 KB Created: 2021-09-04 07:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa9d6c5c90eb1034d2e56d0740949518 SHA-1: 5388cc6720641cee71e6dae6dcf39a5f7fadae67 SHA-256: 2f0b97d7fa3536321821e56ddceabbf418676135dd06b579a4745ca8225ec5f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to compromised CMS upload storage or disposable hosting, suggests a link farm designed to redirect users to malicious sites. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.naturhalles.fr/fckeditor/userfiles/file/pedakekuwomumowomilazox.pdf In PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/c317395b639d54c14b9f3146e74d5e03/lavebifaxo.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/74061414881.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/nekujujikate.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/vekesudozozunido.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/3617077214.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/noxojutifug.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/kalanogubeko.pdfIn PDF document text
    • http://nktrading.qa/file/files/58471225063.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/16335987159.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/zagifiziresaladelo.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e83591b7d3---82876539553.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be74d27ad4c---4805006697.pdfIn PDF document text
    • http://juentai.com/userfiles/files/98790986102.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160925bb0cb8ee---kugunirasewigiwi.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/vitanogamokijuvejule.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/21919612136.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1eda92e925a46c113456d5728ada34ce/penel.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/zoxusomivizatubipemol.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/guwuwadukezikezupug.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/23654062710.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/somerevumajudorogiduril.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/92229882755.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/pipifuruxoxowivivotekevi.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ece66c7240a---82953389610.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/ffbbf9c5d700abe6e8f1ff464b30e246/baxibefejexagejusumugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=kitab+i+aqdas+english+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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 21308 bytes
SHA-256: 20abcd94cc504a5198838fee6ac495f644388d454feeb3694ee872500ced7054
font_02_sfnt_off00012f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F91 10832 bytes
SHA-256: 7f01105e7c4a036c51fd3498081d7496444ae1ce87e4cfa155863f048e70949c

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