Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd416a7c53bc6210…

MALICIOUS

PDF

77.9 KB Created: 2021-09-15 15:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b24f0194e78901732d4645a28cf67b24 SHA-1: c3da334fbed6a2aca7de553b9906f7a39ad4f823 SHA-256: fd416a7c53bc6210063b173dffc7501bceb758221e4c821827e8b6f8d90890c4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to copy and paste content into a shell, a common tactic to bypass security controls and execute malicious commands. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://synerhu.ru/uplcv?utm_term=raazi+movie+torrent+download PDF link annotation
    • https://educhina.mn/editor/files/zebisemufuro.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/ratak.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/bezifusidenalaxiveku.pdfIn PDF document text
    • http://infosierra.es/images/editor/69883825987.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/boxubejuri.pdfIn PDF document text
    • http://snft.ro/media/file/lerubawogatatumesi.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/8868d48cacc38f7487f8aa0ae0c91502/jinaxipodoxapijimus.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109051320087440.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613576d5b9250---745595435.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/rolesivakimof.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/65606310751.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/lufamixo.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/ditakasumilixexir.pdfIn PDF document text
    • http://asja.ua/userfiles/file/mulokezisalinujeluvubobu.pdfIn PDF document text
    • https://svltv.in/userfiles/files/34361424163.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/57847762988.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/fv90ea5u6hb92p7k5c6tsmnjof/kukidij.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/fasuzutezozawalu.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/71497341521.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b4d48154d---43844703476.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/tugoxukuduz.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vekekanujipanuxunegavisip.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/dedudaweberakobamusagu.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://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_off0000d013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD013 18140 bytes
SHA-256: adf2109f38f661cdf0c614fed00ec3f0a28966630a99b5e3b825717a8366bab1
font_01_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 10500 bytes
SHA-256: 2ba04f1de8d3845841d128769280f0edc7a5c23659d14c5bd6622d80c032f202

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