Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a553d8311f59be6…

MALICIOUS

PDF

78.4 KB Created: 2021-09-13 17:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c1206c8d302bc95b9c4d3efd3369ddf5 SHA-1: 14b2e2cad6192db2993858087945b4c3164ac1ce SHA-256: 2a553d8311f59be64f60d37f651088aef863c9c7370f37e6c01701530f5b1e8e
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 ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects users to external URLs, such as the identified 'ladangmimpi2.com' and 'dezsredstvompx.ru' domains, which are used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://ladangmimpi2.com/contents/files/67060984068.pdf In PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/leraza.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/dorelejev.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/14517090060.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/69398192960.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/ninezupekul.pdfIn PDF document text
    • http://ustunongel.com/image/files/66202947510.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f088938a5b---16674532441.pdfIn PDF document text
    • http://rem-proekt.com/f/file/duvuburapetosazuve.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/73e26a40e155cae10b31ae1c1b5af1fd/pinapogiro.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/nefilewuxigejanupebonigod.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/73830451114.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/lamukebavotuw.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/32433446295.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef4a8c904c---68648578663.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/donaj.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/jujuzovedenaputolilazam.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/rewuvizu.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/bigebalodig.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jidafaseruwuz.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7c6dadee5---joduzupamulekuto.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/2ccdba71f6f83f015633fe44f8c25fdf/36362027751.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/zutubifufuveba.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/wikebepamenulunupil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sweet+selfie+camera+2020+downloadPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/muzabodejupaganenojefor.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D1 18716 bytes
SHA-256: 5f49ac9912e2d19f7c96d405a4e693dcd0d98692467d63d1805feb6f254b1fe4
font_01_sfnt_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_02_sfnt_off0000f9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 11040 bytes
SHA-256: ad9b47e4a40443026c29a613aefcab55659a770176e99c07fecac7a50965dafe
font_03_sfnt_off0001136b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1