Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc44ffd2249c3b47…

MALICIOUS

PDF

69.8 KB Created: 2021-09-14 06:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7c8c6d9f7d3aafca4378b372bf2a38d6 SHA-1: 5f4467b598e6dc53ae1b058ccfa897d77c593867 SHA-256: fc44ffd2249c3b47ce3ddf1e6cc0d3ec8733ce84e7c126a87be32ec42f42e635
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fertilizergranulatorprice.com/d/files/segipujezofofadali.pdf In PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/62443779998.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-12/20210912220225375620.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/jutawixuxexametova.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/4213988427.pdfIn PDF document text
    • https://salwangurugram.com/files/75237222103.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/71841070111.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16131e241ad703---rumomudopimoda.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/nuxadedubafa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f8e07ff53---sufugodunu.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/semigowugisovixajif.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/56844379653.pdfIn PDF document text
    • http://kyea.org/imageuploads/277463518.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/6ad0cb5bd4ca9c4a580a5024d003529b/11953683054.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/82227063649.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01fdad4d2---44376616365.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/kurubevafivegaxivu.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/bimeledawas.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/raxobadojusaputiroduduxuf.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e1c05a95b906184aaf61a3847ba4f473/14724205315.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/daloxixekafepekafupu.pdfIn PDF document text
    • http://zuszdounky.cz/files/51628218943.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/fujiriwotujugijuxego.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/welifokabejap.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fa3dc35a2e74587bbbe83bf2427134d4/godegagidajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=x8+speeder+app+not+installedPDF 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_off0000b577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8E 10600 bytes
SHA-256: 9adc3de552677ea7c5e0f58647f95694f50ecf894387b4e9a85807db87dc8722
font_02_sfnt_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 14212 bytes
SHA-256: 98c538ab7c09b6c82d15de7244566572f7c5ffd545a1981da039db68431a76a2

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