Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f6c095c2ca08c7…

MALICIOUS

PDF

81.8 KB Created: 2021-09-09 19:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e13ae71bbcc3a93c6405b2ed7c1ad60c SHA-1: 27d8e76e99ca656a6b9e3f3e84b78952b801b491 SHA-256: 50f6c095c2ca08c725c3d15f744a822bb56d8349a2ec13a3f3e4cc2709dd0b22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://albawadiroad.com/userfiles/files/fidarunazomovejamene.pdf In PDF document text
    • http://musorcentrum.hu/files/article/file/11177791835.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/53120464525.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/xopasememit.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/2223232795.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/33190947550.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/tegoxetaxoxesoran.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/14481114569.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuxosafebiginuputafiposud.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c91f90e08---67167067885.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/93499025540.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/kowuvelanomuv.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/barabodiziwiwamopepud.pdfIn PDF document text
    • https://partetesal.ir/data/file/juriki.pdfIn PDF document text
    • https://armenia4d.com/contents/files/68574118806.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/jorolatabepamopetivukarod.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/mafarezefedokixupisezez.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/93083133747.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/6839361334.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/21325058930.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/94361467153.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/23685915969.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/1127812139.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/77566597816.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/pumedujofasenosabubebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=tamilrockers+apk+downloadPDF 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_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 18444 bytes
SHA-256: dd29e1dfbd1de1caa54caaaf7b03591671eb8e8e893668a2cc59ed1244bae920
font_01_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 10716 bytes
SHA-256: 1f256eb6ef2052efef2d896cd5df156148d9bd79356d1ae04544a5098ebbee37
font_02_sfnt_off00012133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1