Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0bd5f7eb13e535…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 12:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 27f714c3840411a838a5153287adef0b SHA-1: 4caad2d34754523fd1065ed8b669e13eb19e4210 SHA-256: 0d0bd5f7eb13e53575508cbc0eeb7287fc5e5464b28466ec73469923f0863fe8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links, with a heuristic identifying one pointing directly to an IP address, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, indicating a likely attempt to conceal its malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137ff46c0ea4---sakikoka.pdf In PDF document text
    • http://laros.cz/UserFiles/file/27880849906.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/23075731028.pdfIn PDF document text
    • http://aa-nusd.jp/21283554898.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/41155125483.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/84062821460.pdfIn PDF document text
    • http://goldia.cz/data/file/wakosabigawufisuse.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/22923742348.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/jufexa.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/35812230343.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/hn6hbri0bu3tjcsl46pum781ul/kesedavazuvaje.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/44503258460.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-17/20210917060859166897.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/28116158379.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/52534722086.pdfIn PDF document text
    • http://med-os.com/user_upload/file/62224415257.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/72613078756.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210906124725_fgjrei.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/ragatewabudebalev.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/76347126812.pdfPDF link annotation
    • https://franchiseharbor.com/files/files/57857325608.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090719465995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=shrek+watch+for+freePDF 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_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 18532 bytes
SHA-256: 498cfaf3b594769366a52f39f96399f3128501e9b31fadc2c052f896511d0ef1
font_01_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001200c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200C 10276 bytes
SHA-256: e2b7daa7b1d1766f84dc5405cd20522d198110334b464f5487491d59c0bdb2ff

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