Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f84c39164bbb84…

MALICIOUS

PDF

141.3 KB Created: 2021-06-27 13:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 66bc634caf104ed30871af0c1cd37a61 SHA-1: f96c64cb16c9eed66cd0e0947b65fdda96ce3949 SHA-256: 04f84c39164bbb84f7e4c7f352541a0aeb313acf2f4d27d47f459fb6b8d44736
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://thegioidahoacuong.com/uploads/image/files/sonugoje.pdf In PDF document text
    • http://brette-animation.com/userfiles/file/99536484210.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/07622239bf17f004ddb5b19851c8ae53/kasejoxaviwari.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608145d4c98c8---domazovosag.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a838d3375---68018517290.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/6hgg55rj5007cajsh9mjooh1ek/josavazimopif.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/rurefojoxavewufuvugalu.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/wewori.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/94429604287.pdfIn PDF document text
    • https://loctra.net/userfiles/file/nopokewalaniletavizipaxo.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/94717863303.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7b44ea7b4---jadewinixikovub.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/24918220370.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/608a29d765602a19a51745af3942a50f/33469969468.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086efeceee4a---91852367531.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/visamisozotuvetunozugamu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/2n9kut4gprsj2fjfc7agisci9q/84532282307.pdfIn PDF document text
    • https://securitydm.com/slicice/file/vuvelo.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799b45720ba---burifiraje.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/vizinu.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/mekiwovuxe.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/91930205504.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/d31ff256e78048705aa3e0179dee81ba/tirikuwotesutibafanexop.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2d93b69c5abe1d1c9a7ace53236b88a4/9130849440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=organelles+associated+with+photosynthesisPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/11e3ccf8e51c21627cac79ef1b831fec/33734475010.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_off0001c54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C54F 11016 bytes
SHA-256: eb3c5cad688e9aaa70709c44ce1d1c05a7a392f27fdf1232cfe200f4de12ab43
font_01_sfnt_off0001dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEC0 19000 bytes
SHA-256: 68eb6b5e36c8a4ddcab2004686009da8f9c693cd9da0a438115803c0488b9f99
font_02_sfnt_off00020f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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