Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd477d618761e27…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 01:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c481005478265fb05558259b8937584 SHA-1: fb48702c45495a4deab1c3fdbaaa36a4076f2fd3 SHA-256: dbd477d618761e27ef86bbe70e48afa110ef1fe7954a0306f3b4b81a6dd143d5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=mortal+kombat+11+ultimate+download+torrent PDF link annotation
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135603537df5---pimegumizesaxajalujob.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/nofomo.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/rivugifevibika.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/5569050229.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/xofamifuzogux.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/nejazazibemexiwek.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_E024136AABF5F36E.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/87589659224.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/63435965651.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/18194134374.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/37062453436.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c10d98f33c55c9d4cba097bb29cc38c4/8201741750.pdfIn PDF document text
    • https://pokereshop.cz/data/file/girotarefibemanox.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/vimagitebimekesu.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/dojazokururuwadu.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/39868190282.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/wowanudoxurewawadumosul.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/tepusunoruni.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/fidafudegumebobidaso.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/30686501404.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/51752585502.pdfIn PDF document text
    • http://getdol.com/page_data/file/tefavix.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/51761414842.pdfIn PDF document text
    • https://flyags.com/editorResources/file///bukedorifa.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_off0000d6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 18860 bytes
SHA-256: 7447f7498ce31460e37708415d1b4675322abafa477e40eee127e4f79db1138f
font_02_sfnt_off00012023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12023 10704 bytes
SHA-256: b3807db4d32d3d18ab1fa7d8cce7e3fafc4ce21e28629d8a7caa4970b25fc1ee

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