Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5ea84f62bbb1c6…

MALICIOUS

PDF

84.3 KB Created: 2021-07-02 02:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: d11fd4c4ccac6f1a3b3d2dd5d88c2928 SHA-1: e1be672b88ac386cbe36154a67a59898e2f6914a SHA-256: 9c5ea84f62bbb1c6820f43cc2dc56557ba699d2bc7fce036d4df91a43faa4d47
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm or downloader for malicious payloads. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=how+to+unsend+deleted+messages+on+instagram PDF link annotation
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/qut457m9t1rklsql7a1m24rbah/nigokotukofamufetijazore.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/5ldebjj6bfpl9lqe544mpc4u1j/buzedefotekegujopif.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2f20af1f0---texilimezutuxe.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/aacd14a365315be66173c2e56da3bb05/13089115024.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/52870508475.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e454ae374a---tebugezoden.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/digofejupezijorejomodisa.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/raetilgqrmm1i3lu4pba0ovcv0/raxinumixapus.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/10916568551.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/lovefemegabadu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c26645ad2b8---60005681871.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/56062546707.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d16545786f51724ee5343f7c1b5bdc56/11679556616.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/95107361544.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/8b5d99a38fa001c171f09d7c29a77d11/vimexazizuzor.pdfIn PDF document text
    • https://atl-50.com/files/file/tolanalemuferunofis.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/67967489475.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/79inegm1ol32mdvv4n9o2dpe5h/guzajobinaxalixuxovamo.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60bd5d50c9074.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/zimepepafuxiji.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090586aa1de9---wakadovinev.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7017b2591---61675138833.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/73984307042.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8d5362249---dawejos.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56762c48e9---44588416054.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_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 10768 bytes
SHA-256: a696f5af3456e8d8359bf428da92bede85f90a6acacef3c7942eea2cf779dfc1
font_01_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 17416 bytes
SHA-256: b3f56b9c4598fe304fe297484f9ae77fa46a0c3b211ece3fd3e4e41aebb84665

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