Malicious PDF — malware analysis report

Static analysis result for SHA-256 c680e13dfd0c1d36…

MALICIOUS

PDF

68.7 KB Created: 2021-09-27 02:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9c496fb15532e3ed0e5003566c4aab69 SHA-1: b3a4cad6e380baafcee6ea90a2bb308fafa31815 SHA-256: c680e13dfd0c1d363a45e68b44b0f3bbd31fe853c9ea9e135ab2e6d0f9f98afe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to redirect users to a large number of distinct hosts, suggesting a phishing or content-luring campaign. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cbgnfinance.com/userfiles/file/43248585178.pdf In PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/57602644703.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/31974454779.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/79814677725.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/ximaroduxirixudulajopur.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109050017196691.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/witizemejemuwa.pdfIn PDF document text
    • http://techbis.pl/files/file/41730438339.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/gudopinetax.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/20799162581.pdfIn PDF document text
    • https://buka.ru/sadm_files/fatarilaburipa.pdfIn PDF document text
    • http://indel.sk/userfiles/file/jugunesiledixuwiweni.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/13005899194.pdfIn PDF document text
    • http://rnralpha.cz/res/file/xafawofenimubudase.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/60846306029.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021926_17117_349.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/dipakupajudamararikokizu.pdfIn PDF document text
    • http://forti.in/userfiles/file/lemiribivukugoteriwumed.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161416eb9b2303---43239758517.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/xobepemavobofivosobow.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0190448ea---53445844189.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/60921498329.pdfIn PDF document text
    • http://mc-opony.pl/files/file/27274363157.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/64199460096.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ek+paheli+leela+full+moviePDF 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_off0000af38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF38 15384 bytes
SHA-256: d1ef80ca375abf8d8793462dc961bf1a5c508bbf2c017cdb381bde21c1bfbf56
font_01_sfnt_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 10392 bytes
SHA-256: 989e4625a7cbfc7c905c8424c2e64e3e7ceca15dca3a44f6b50e6cf187f7564e

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