Malicious PDF — malware analysis report

Static analysis result for SHA-256 54db2b95aa55abd7…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 23:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f89ea67c1e6d5251e7297a2d881b61b SHA-1: 5a35891a67997fc8dddead133af35882f60346e5 SHA-256: 54db2b95aa55abd7c645b031394168aa4d803c246b6e4e6284f960ed9e1ae44f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting it functions as a link farm or phishing lure. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest it is used to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://geostudio.eu/userfiles/files/zuxus.pdf In PDF document text
    • https://a2designbg.com/userfiles/file/7155319452.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/61417538234.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/moxenikizuveduwaruwebavi.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/batuli.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/pumerinuxuxujewojafap.pdfIn PDF document text
    • http://infosantiere.ro/userfiles/file/91630519036.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613426cea3f05---65476684944.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/28733369696.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/65031144315.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/37224898383.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/jiburumagarixarasijiwox.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/xutipoz.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/42773535071.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210904230355_1674742315.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/sipibevijemetisapo.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/bimamokufalexidisov.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202194136496537.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/kudenefetuwevokena.pdfIn PDF document text
    • https://chptravel.ir/data/file/zajokedaw.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/kutimoxaluxedajole.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/23680972170.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/6015176119.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/fazulubibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=steelworks+apk+editorPDF 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_off0000db36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB36 18244 bytes
SHA-256: 9d0aab048a6ae4547651595a4238eff241612d213a920e48416324a78340889f
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 10532 bytes
SHA-256: 6b1b44c1871e8c7ff1a2acc86f08ae78759f9e9439d70b2e909e1cff5f7f40db

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