Malicious PDF — malware analysis report

Static analysis result for SHA-256 304844a65dd3ad79…

MALICIOUS

PDF

70.7 KB Created: 2021-09-02 08:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1675b77b7a8b0fa5f77aee9400d84266 SHA-1: fda761516350335af73f87cafac399ebc934bb8f SHA-256: 304844a65dd3ad79586fe6d91db7042821196c734f4cb1dd7bcd7f4dbc06bfc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The embedded URLs suggest an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/blkn997qu8ibu3gsb9ek7a6rln/32593138648.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078203e54bd1---50948631674.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/jorujet.pdfIn PDF document text
    • http://email-database.info/userfiles/file/bowizusezonar.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/vuzuzifatonigalevigel.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/99073541811.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/4101885187.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/cca5721262540ba341a1a8f8107f7b8a/98461976416.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/banibija.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wuvofikejipipodesabitebov.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/h0nitufh607bu7p3mohlpb923r/vesopodisogenomududo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161219be3159e6---59076748503.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/77949791451.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/giloxetete.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/trpvcpvu14un4phvjtf3q7dae6/3221518880.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/k2hsmludtn5ef12bna0rtlshvc/vufututovikexutovodegelo.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/pudotomalubakigirekage.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/46827970367.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a705f6cac6---95603168436.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bacecec9e1---ruzodinapaduxiwi.pdfIn PDF document text
    • http://mploa.com/clients/2/2c/2ccb326c3583e393996f575e36ee3974/File/mobedidilutapizidoxowi.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///16682924385.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/fexagimolipezolit.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abcac2bf6f9---86655326731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=most+probable+speedPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f1a4f00d4d1e3c2a09c149b5a105216c/50957902742.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_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 10320 bytes
SHA-256: 08218e06ad7e00828daf289afadfa58e4b80c1cd0c24ec868f1272d70cc732ce
font_01_sfnt_off0000d182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 14384 bytes
SHA-256: 30314c984c91fa25e21bc47ef0c902e47c94be47c0ff471db95a67e55f65f453

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