Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc8ec094825c25c…

MALICIOUS

PDF

82.6 KB Created: 2021-08-17 08:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e7b47d125d0c9eceefa9282a206422a9 SHA-1: 8fb19e8b711b47d85941de075ff7a2fcbb023767 SHA-256: 2fc8ec094825c25cb4deae6517e5fffeffcb9e2b61b0bc4d5e63c31fca1844a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to link farms hosted on compromised WordPress sites and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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://fallsplat.se/file/lenodinakixabofafom.pdf In PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/xogigelowokedenirotapovi.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/88444111669.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160868bf41ffe2---vaxufenakomusanedofino.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/48955267224.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/52837720679.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/e9291e7eb7e7ac93af536d8ea86a6df7/rosejafefumekapemo.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/gexinexen.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/legotetedojurevediv.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/81252326551.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/54n5sorc33k7uk0sd2qurin6uh/xivopesolasuraxusigomojom.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/fanijimunokesajelekugizob.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/70aad113276a98b851560ab26c74b6e4/86825480821.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04cfa0708d---vumomanejufebodalebefeg.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/89046857577.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/54575438870.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099af0c095af---44101011188.pdfIn PDF document text
    • http://atomleasing.ru/media/File/sosepupipatebukorupe.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14cfe6b2e4---35176185480.pdfIn PDF document text
    • http://splogservice.ru/content/file/70022081579.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/oi2n7201nrbpg8hbd7ddig0f8f/lemewutawejufub.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/sezelaxuru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+vidmate+old+version+for+androidPDF 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_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 16916 bytes
SHA-256: cfe0e59aa140e168c6e9ba5644cddf473af0f9f73da9f60041601d763d0878c8
font_02_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 10668 bytes
SHA-256: a95f2141ba65f169ccb9a8046287224616fc2ad9e7bc44f62cf6afd4148e58e1

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