Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76d5bab28101ba4…

MALICIOUS

PDF

95.4 KB Created: 2021-09-09 03:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34298ee64994a1a5705eafa322fc35de SHA-1: 4ba94e9d7eff62e78f5b94807d6cb387a9e96dbb SHA-256: d76d5bab28101ba451bbd2333d5b18bbd46ed6f270b3a3c3be111b3e94bbbf29
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 embedded URLs pointing to external sites, suggesting a phishing or redirection scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting. No scripts were extracted, but the overall structure and URL distribution point towards an attack pattern involving luring users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://drsuthichai.com/userfiles/files/45087017818.pdf In PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/3342626648.pdfIn PDF document text
    • http://annabarons.com/files/files/tubagiteloxixikamegu.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/xesaganogaxelibu.pdfIn PDF document text
    • http://djapm.com/userfiles/file/87465616821.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/tiruwukevogojebak.pdfIn PDF document text
    • http://charivne.info/images/file/51870614291.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/razatemo.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/86760479523.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/fuwamidelapideroxizi.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/vijupotenexem.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/ligozoxogisidinobupizeboj.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/dovoxovok.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/lesin.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/71511475545.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/87161683623.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/kekabulana.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/28965882690.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/df0b68fc221da6814188edacca5fc012/24998715694.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210905_021138.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/62263404025.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/tebamalu.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/44122224858.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/fowafinidunojagezovep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=brief+history+of+time+book+pdfPDF 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_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 10848 bytes
SHA-256: 0c85cad14ca84027e8c09b1b44bd5826d0317ed601ed3153fc74c1236b1a2d5d
font_01_sfnt_off000127ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCC 18484 bytes
SHA-256: 12145807d189d5c54cb851aebef764cebe52eac66738bd0d95c8bb4817de2a54

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