Malicious PDF — malware analysis report

Static analysis result for SHA-256 94230a700e942c95…

MALICIOUS

PDF

80.9 KB Created: 2021-09-02 20:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a97e0950ed31fcc97a24ae2d1dd4426 SHA-1: b03d877f42aad5a568533650c871fcd73546d03d SHA-256: 94230a700e942c95f04b1f08a050a6081d7050ef39395a10e6f0e45343afddb6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that aims to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://garglob.ru/uplcv?utm_term=convert+farsi+pdf+to+word+online+free PDF link annotation
    • http://cctsjwhs.com/clients/0/08/08395bc9c2b8280888f0dabd04457394/File/74704792103.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/91011301368.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b052fe5e---70456688486.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/luremofazevifeguvav.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/1956702580.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/gufimuvonipa.pdfIn PDF document text
    • http://goldenrulelodge24.com/clients/860883/File/jesefoxo.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/bixitulodipip.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/36923507131.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98a2a586c---lejusunogagig.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/xedojomigazu.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/1da25aeb1066c3ea1bce5ffe76e1685e/tusamigidaziwos.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ac419459---69345862082.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/65041046874.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e32a3d48e1df5c3205a17f66b07e81ad/javazivifamibudujenelel.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/85171505640.pdfIn PDF document text
    • http://maremania.net/img_pagine/file/31586474410.pdfIn PDF document text
    • https://binhvi.com/upload/files/73303992007.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/h83olaucj7h80s4qfjqviiscnv/talumafaf.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5d2q48avvif02isvd22glemhae/zodexalitomi.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/0659a2c27d0fed12d3fcb51290583afe/raxareni.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/51961006617.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/18170724032.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd30acc6a8---48312307301.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_off0000d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 10672 bytes
SHA-256: da80a5686e9605e7733eaa10db1381101462a2715e3df3254d66a83527094c8a
font_02_sfnt_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 17636 bytes
SHA-256: a4aab0025f77e66dba4f2e8ba4b1eafe87406b6b89fa7323b458b5b51134404f

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