Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1a56350c58cbfa…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 09:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e7ca0e582ddc3109134d83727a41aed0 SHA-1: 477c07d7f8c715eca693975f3c8d59cd4b1dcda9 SHA-256: 9d1a56350c58cbfaa07a17d5d644e96a2626eb22343edbb85dfce9f282e4f2b3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised WordPress upload storage. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of numerous links on disposable hosting and the ML classifier's output suggest a malicious intent to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135f51d3ad09---tixewime.pdf In PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/vewumub.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/warunopew.pdfIn PDF document text
    • https://mihalex.by/files/files/6667962118.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/bapiwegegiwuzififilef.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/52677100047.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/fizefi.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/65129061940.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210910155854_914792531.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/65569213284.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/ferinizovakonikokubaxo.pdfIn PDF document text
    • https://amgaa.org/temp/files/rupusajajomomelifu.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/pakaluro.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/24211252504.pdfIn PDF document text
    • http://remobudostol.pl/pliki/zipozevitogeminawo.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/vajutibum.pdfIn PDF document text
    • https://fong-cai.com/upload/files/pujudasedekaxixutiwisel.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/50170560613.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/ziluvatibuzinozalaxesata.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/bebobojud.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/0d3e05c0a22ef7b65156586410f9821b/69443376181.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/barekexi.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/76c5f29f1b1b08fe5f2f130762d7af05/81985578590.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/98747102200.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/44433784730.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=rao+mechanical+vibrations+5th+edition+solution+manual+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B8 11372 bytes
SHA-256: 17347ff1c1148c4fc0a8f50d6fd727fa41741a9e67974885a2fd8e6186d0479b

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