Malicious PDF — malware analysis report

Static analysis result for SHA-256 916eeef10bf9486f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-13 10:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5a093572ce8622a4ec42df4a2c172216 SHA-1: 44069a5999f4b61b78d7be11049d94263b0d7eb5 SHA-256: 916eeef10bf9486f8e2a96b4e6e0c185b2ffe252403b0f99713045892bfbc170
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ajarnveerapong.com/UserFiles/file/4716149688.pdf In PDF document text
    • http://constantemails.com/userfiles/file/1631453584gajipatibepobubabap.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210905_5BE9C88B00300D90.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/paxuposedizegukepopo.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/21091310153966853010vyt.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2784c507---desulewijovezitejakara.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/zogij.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/29352224412.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/dazugodo.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/18298259664.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/64567854123.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/vobojexezegatomiwurepeve.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/12246352557.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/tofulifemusita.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/vivukufej.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/70155196682.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/92107334100.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/wivowaditilejope.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/7829452318.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/85135568572.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/nemokirapoderesa.pdfIn PDF document text
    • http://timebymtm.com/upload/files/gotijukixu.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/xixeruritozatel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=hack+avee+playerPDF 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_off0000e26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 10048 bytes
SHA-256: cfb6cc098f8284b9b1f2c07d73a9c821f3209a4a93b3d8433fbbda9b943983cc
font_02_sfnt_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 20704 bytes
SHA-256: 54e69908339b99e8cea5079961549a8794ef916133bc05b4c16c4a4ea74876dd

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