Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1848398a51d03b…

MALICIOUS

PDF

73.1 KB Created: 2021-09-10 16:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 34d0e02c60f21eb40bb87bb91b92e69d SHA-1: d32d4e146e74826f3e6585de95c11c8e2b14390a SHA-256: 2f1848398a51d03bc89b9d91b2c5e21bcb4a0fa8129cfa8c6669707d4a9424b3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs point to suspicious domains, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://garglob.ru/uplcv?utm_term=mobile+watch+low+price+in+pakistan PDF link annotation
    • http://mingzhicc.com/userfiles/files/dejexepufixosejekovaxos.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/88154511525.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/176987356.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/mowuvopuganufanivi.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/lubopesujuxawu.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/pukunitupibal.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/xijovatetusuwojawed.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/fukoz.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/wukiwuturevenekejuri.pdfIn PDF document text
    • http://modern-pro.ru/files/file/99563363840.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/gotutife.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/lusen.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dfe90f378---josovepozunorarimijidebuw.pdfIn PDF document text
    • https://cet.sk/res/file/diwukimekexiba.pdfIn PDF document text
    • http://bamor.org/userfiles/file/33325402549.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/cd3652f00a7a2716ece6ca3861c91826/jofeb.pdfIn PDF document text
    • http://warehousetraining.ie/images/saredarumebasedexuwe.pdfIn PDF document text
    • http://reopen911.info/media/file/53245923334.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/50694426013.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mufuw.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/jisonixaxuke.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/liwobevur.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_off0000b9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 10784 bytes
SHA-256: 04ed2c60ada2a90dd51151b5a62aef34ad7b98cf9c73935e51d5386f62c32248
font_02_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 17184 bytes
SHA-256: 01de66e26c328084f8fef3eb1ae2d9c8d328839e63924000347c55e832780a7c

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