Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fb03838a70a27b…

MALICIOUS

PDF

85.1 KB Created: 2021-09-17 02:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e8de1904611b2fec7fb7c79bbed5aaf5 SHA-1: 498b14e97a5ac412636a51adb6c7d95f4463df1b SHA-256: 65fb03838a70a27b60059d1713a2abeb2701bddd9ecff8d24f1dba37cffd268f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://aumnat2car.com/ckfinder/core/connector/php/upload/files/27831498117.pdf In PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/12038803300.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/58427223430.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/modavisi.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/91766682638.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lupafux.pdfIn PDF document text
    • http://vhshf.de/File/tetazorumiwugij.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/4394921936.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/mebugoxoxokefivomogiso.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210905130040_vbiasa.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210901211640468.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/nokitiw.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/74252925421.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365f9e7c6a3---vatipeja.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/41688591607.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210907194914.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/xufajegolodiromo.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/65611935796.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142c71044c85---1232854403.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/buvezurixegebutuvusuk.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/duzapubadu.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/wiporuxekipolimijusiwugob.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/371216186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=echelon+app+androidPDF 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_off0000e8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 18056 bytes
SHA-256: 010ab80c89b9d2f81fb225132c79c52ac118ba9b4ffcc9fa460822b1dbca5173
font_02_sfnt_off00012fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD4 10328 bytes
SHA-256: 91f782bda0dc5d6b4a1dfda2c820ffb4659636c8512e958a4ed1ae00fb6fd57b

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