Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9eb87bce61d64f5…

MALICIOUS

PDF

88.1 KB Created: 2021-07-15 09:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38c6270584b8cbd1b2e052f0bf4f99e7 SHA-1: 80650c28f3ca8f2466087b8c4064490b4597d148 SHA-256: d9eb87bce61d64f59abadc2a769617eb90778a1741864a4e5d4bcc7ca2fa7b03
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious payloads or phishing content. An embedded JavaScript stream was also detected, which could be used to exploit vulnerabilities or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://infrive.ru/uplcv?utm_term=ioi+ready+player+one PDF link annotation
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/a699fa39732e82dd120be7cf44ba1fba/fuxenesuwer.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983ed76d5a1---26618442919.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/vavanodisukojazukupilux.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/redab.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960d370931d---rixoj.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021060421020273499.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6a4ce6813---81390266137.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c699658f6a3---viwux.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/sajakoled.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5f45af8f162c9eb3f80f220b636bf3ca/fogivuzonekukesope.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/likiwenogepinuzezu.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/92084958381.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/zodimebugenokexosivonumaz.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/27f3cf722cf5ae41fdc1b80593a39526/4271962891.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef9d7dad8---jazemopez.pdfIn PDF document text
    • http://deltools.com/userfiles/file/46444515318.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3384b7e52d8d1fa2db055a9448e5297f/vekarefaxiw.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/giwinefidorelusamogev.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160785bcacf079---72113787280.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/17315b53ecde84e26bc229566644a210/82481034439.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/xabebanerakamubo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c60f07d13ed---furokovifimanevunukupalom.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b025ecf18---37944263767.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb5c7096e5---32168366519.pdfIn PDF document text
    • 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_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 10184 bytes
SHA-256: 63889060863a1e3ab2ec5f8353f592a07083c5d36ccb092e0831de0b0b95ac45
font_02_sfnt_off00012736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 16972 bytes
SHA-256: 004b1f5787c792f16cc87fff96d1cb9bb52f84abc5998f781fac149b3e553392

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