Malicious PDF — malware analysis report

Static analysis result for SHA-256 510f973dd13a4cc0…

MALICIOUS

PDF

83.9 KB Created: 2021-09-09 07:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc047306904aa65e9f84d7f70280f647 SHA-1: f18efbd849665719ef974774f8049f79c8aac704 SHA-256: 510f973dd13a4cc01abc923f68332c6440d4a52a73b0253fc725fa147adf4775
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://cructi.ru/uplcv?utm_term=selena+gomez+cinderella+full+movie PDF link annotation
    • http://exhibitionchannel.com/upload/58656195263.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/zimobizaginova.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/gigadamesewusukiw.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/42446088248.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/50136631599.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/27999842968.pdfIn PDF document text
    • http://zgic.ru/!upload/files/56978408664.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/jisepiguri.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/bijubibaxuzomafogo.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/81284774080.pdfIn PDF document text
    • https://digiconelectronics.com/media/mezazilepu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161396af5b15d9---tumonijedoxuvexo.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/xadog.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/3365795479.pdfIn PDF document text
    • http://profstil.az/userfiles/file/34565508518.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/zanivapete.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/fijimoturesabado.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/95827898221.pdfIn PDF document text
    • https://85097781.com/upload/files/84482630777.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/d1b6db6d299ebb7d35a2ec1ae17202ed/62008591839.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/66769042691.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/26840940788.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/lukobojexuginurotadogolap.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210901170556.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/39278297081.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_off0000d66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 22484 bytes
SHA-256: 0dfe3c18aaf66d4f21fca30a69bb56945c9adac269d2f9f6f38dc9bc27ade4b5
font_02_sfnt_off0001294a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294A 10856 bytes
SHA-256: 9d2699e12d8f2f0e639cff8f3b23e825c0f9691a7d53f3767dcc00fe8c280519

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