Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da6be9eb24131b3…

MALICIOUS

PDF

87.5 KB Created: 2021-08-16 09:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 88faaae721ac3fe65d346d43a681aab9 SHA-1: 20dcc8ae7651f7eb83334309aab35f4498e6bbd0 SHA-256: 5da6be9eb24131b3b122e6b1461ec79769fb4a3fd2baad73825786ca9aeeea35
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous URLs pointing to compromised websites, many of which are hosted on disposable domains or use common CMS vulnerabilities for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://catamma.ru/uplcv?utm_term=how+to+setup+turtle+beach+stealth+600+to+xbox+one PDF link annotation
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a32728680918cb38fd9038a22baadc9e/faxenoja.pdfIn PDF document text
    • http://meskerjager.nl/media/files/finatubevinadufed.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/bedotid.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/98bdc3700e99a0ab8a51fb41cf4d93fd/mafijukorizokiti.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac38fe429a5---fawibogasap.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a5edb1951d4---33162532828.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a57c14c97d1---83681324023.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/bakesilumi.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/xalowozexasixegitakulero.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/pidugeganuwalizuvenod.pdfIn PDF document text
    • http://orderkai.com/uploads/files/48158333586.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cff0d876d95262280c94daf47b1f6630/23206175014.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/97698816099.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070fa8600ee4---5545918675.pdfIn PDF document text
    • http://poiskvod.ru/images/file/fewezodusebujasewamefik.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adac33fd5---fanorumugidojitujukeko.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6d80bd8968929adfdefeb85d39e1897b/82195274114.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ccq7po2imudo9d0c8361lonnm7/rewesimunonewisaxi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba78e377e3---xurukogugedi.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160abd224da6a2---63485243453.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9253415ec9---17874090502.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16092aeb47b9a7---kemixoturawokusisid.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ec21b3u4liu5tkmsjdf5mfeqc9/tutozimuvagexepab.pdfIn PDF document text
    • http://medica-brno.com/files/74349326555.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_off0000f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 11088 bytes
SHA-256: 1187bb519caeee2e4b56b687f2c38f6c8225e171ec58b1b7b31a08853db77d37
font_01_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CB 17576 bytes
SHA-256: 84dfd4993c146be1a62e25a45dc82563c617fae5b533ffd190dae528531fbef2

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