Malicious PDF — malware analysis report

Static analysis result for SHA-256 883e016988c74d8a…

MALICIOUS

PDF

67.6 KB Created: 2021-09-09 13:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e774d714406d165fa7824cd3c6d24e7b SHA-1: 7b9f151266d456e915fb0dd531e352d24491f883 SHA-256: 883e016988c74d8a2638ff2c7a051bccfe27901d656c9795e92e4f0543623c53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs, including one that appears to be a redirector with a 'download of android applications' term, suggesting a phishing or malware distribution lure. The PDF structure itself is also noted as a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://chcial.ru/uplcv?utm_term=download+of+android+applications PDF link annotation
    • http://gruppocreta.com/userfiles/files/zesomomuwowixilewisurimow.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613904739a78e---6558611681.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/97053800618.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/98377699817.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/18629841511.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/bawutotoxolagu.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/gogukovos.pdfIn PDF document text
    • http://446888.top/userfiles/file/logeraxe.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-7/20210907002416825275.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/nedel.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/55719288315.pdfIn PDF document text
    • http://katachizu.com/img/news/files/kikadokitonuvi.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/93357805547.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/16762673241.pdfIn PDF document text
    • http://cochemical.com/upload/files/fozojipaloxowenujoduzesa.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/3503775568.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/31201689518.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/vevuroverugivuxo.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/616235697.pdfIn PDF document text
    • http://inphilong.com/upload/files/74938560185.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/56689949466.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/jebejenopozunagubami.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_off0000ad14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD14 14492 bytes
SHA-256: c7943f58632d005e49fb23dd92dd6db409c6b6b3ca506922fc7afcb9f75bc18b
font_01_sfnt_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 10568 bytes
SHA-256: 617f97d794ca769e2d2e19cbb61db7b116577aee220c3922852350e1973bd3aa
font_02_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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