Malicious PDF — malware analysis report

Static analysis result for SHA-256 147542247399a662…

MALICIOUS

PDF

73.9 KB Created: 2021-09-17 02:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2a02b33c32a327e467d67c7247fc9c15 SHA-1: c3f1d9aa802c748b5bc63f6f649221803480c54a SHA-256: 147542247399a6624fb5a50743fb23811f918e80e93f84b1e86b0ced25f4b541
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, suggesting a link farm or redirection mechanism. The presence of external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.aportecnica.com/imagenes/editor/file/gofilu.pdf In PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/35751592742.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/54359688692.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/wiwiritatiwowaxad.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/dowoponunem.pdfIn PDF document text
    • http://nemalipics.com/duxunize.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/28727392729.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/29108641035.pdfIn PDF document text
    • http://446888.top/userfiles/file/siwokepogiwusoja.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/xexumipe.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/96580858547.pdfIn PDF document text
    • https://songhongresort.com/img/files/dekoseze.pdfIn PDF document text
    • http://soles2walk.cz/data/file/90427058441.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/93686144685.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16130c4edc386f---naxapobozib.pdfIn PDF document text
    • http://humanlitech.com/files/files/10767074688.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/deu6jiniv08ltr9n5hi3fsbtsf/zapupokudu.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/texuxixifusij.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/dafotet.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/41084740598.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/91447632243.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/zosesaxonuwesufijixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=english+file+elementary+4th+edition+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_off0000bafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 11064 bytes
SHA-256: 99fb5fd86e13ce84f94df6d0882cd28742c3f4de34e30575435b23d0d57e35fc
font_02_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 17568 bytes
SHA-256: 6a23485f9bc81d35440746ebc31918eeaeeef49fde126015fed832450aaac39f

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