Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e5cdae2a6813fc…

MALICIOUS

PDF

82.3 KB Created: 2021-07-08 02:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 68c94414bf6e3d6b31888b6436c02299 SHA-1: 0c0b810da309d051ea33eb7c5fe46cfca29bdcf7 SHA-256: f0e5cdae2a6813fcbce99f6f0544d75ad56c3b69081106fa9c4bc5a09824df8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious files. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were directly extracted, the structure suggests it's intended to lure users to malicious content, likely via phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e29e69ad82---mafur.pdf In PDF document text
    • http://fygl.net/uploads/file/072249205893.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081277b26530---putitexiwela.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/21484280340.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/36539978867.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1f58c9b1e---dofisinozolepefe.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c217cb07c---83977584694.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/8875b99eae46231dd75d98ef36574ece/5918838490.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c89eee76232---rasan.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0bffaed84---zufikinakukaduxularuf.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767ab5b0a64---buxarafamubonasowuruk.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/53153395753.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/88873680351.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/89114207931.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/a3th2s11oa27bjqni7uu0ce5ne/lapososonolafumudalezej.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/dedozedadafugelabup.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b85ea66eccf2aac37fd98994e4f09e25/22228023219.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/rimoxeda.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91f68b25d4---zarovupuzab.pdfIn PDF document text
    • http://bjjiffy.com/upload/6819447001.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/subavuvuxokoro.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d68826b07f3---79843328400.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210522082116.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/fulaxagefogoduwaral.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/o4um9d4cld25n8hn4hlj766jd4/23656064714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=examples+of+merton%27s+five+modes+of+adaptationPDF 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_off0000df0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 16796 bytes
SHA-256: 1f78ad9ed240c1bbb66cf578db86c9beb334c54dd3831fd64d02d39f2321f72a
font_01_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 10844 bytes
SHA-256: fb9b4d68ec2f1d1c136f2b378097bb8c6f14acdbbdae7faa2cb2404b01b5ae63
font_02_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1