Malicious PDF — malware analysis report

Static analysis result for SHA-256 297450238d864566…

MALICIOUS

PDF

74.4 KB Created: 2021-09-05 06:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b6f41dc9bfd1340835909a4ac3187573 SHA-1: 21ed85bc8534cf45974824e786339165e540919c SHA-256: 297450238d8645661d625ab0dbc119541488b4bcadf9de4d6aac226e87c6a233
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The presence of these links suggests the PDF is intended to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://alexhoffordphotography.com/temp/files/file/18511789989.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/54e6198021d371c834ebc0670f552e02/jirogujelizubure.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304c587e9e---8891006196.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-10/20210710191155918486.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c27d9aff---56733807457.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4666a4d7---36397278331.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/c50f57b2da202cb19673b5745567e59a/tuwelup.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0196af674b2e1adf1c16f9c4c61dc223/71777967053.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/27796194701.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/95656835019.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/fogiriji.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/0176d61e132277688c9c8b8c73d4fa29/lenoz.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/gutoxipogikelov.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/94618490864.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1612a087e1b5f7---lexexebuko.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/modunuputijibijir.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/97772030948.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/78852154814.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae276862b45---70879117322.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c71936973ff---76607116337.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608804f2bee4c---73084333935.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/2750646729.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ea2bc1f6637366fe2de571756d32e0aa/rarafivitavodobiza.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2094061175.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/wizotesomiluvukodana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=paul+thagard+cognitive+science+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_off0000be8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8B 17264 bytes
SHA-256: 29738686210218ca0ed582ff163c3fbbbaa9d4075c535b4ca4fb442493afeecc
font_01_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 11068 bytes
SHA-256: 5a65114c5791f4cfe9c68f92795f0f08a1a3c2162f2c79073cea5d218a7048e2
font_02_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1