PDF malware analysis — malicious · 9d66f47cae1dbb36

MALICIOUS

PDF

89.8 KB Created: 2021-07-18 07:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2275ab71c0b3d23c9574bf1ca7d1f35f SHA-1: 1fee4b40a5c2121412b935dcccdf94b06bb1d476 SHA-256: 9d66f47cae1dbb3602d6513c1d2553e1c4d54ba8d705d4cb2f74cbce4e446fb3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of numerous external URIs and the heuristic findings strongly indicate a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9946

Heuristics 6

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.
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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070332634b8e---segifo.pdf In PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/2589ba3b5e1d83423b4d397e09c3a251/9801680820.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c212e4779f---zudorujuserosunomuzufe.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160975b16d167e---mefuveleniwesaw.pdfIn PDF document text
- http://hzzxtl.com/UploadFile/file/20210630030445585.pdfIn PDF document text
- https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/fe6dc02c19ff8c85605a0cd80955a525/33185606246.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/oicbndh85abr5tbn7sqan0tik7/2183094842.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/fb19d10fd5ec9f043ab8bc474db30654/kesexubed.pdfIn PDF document text
- http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a1bfacad3---90268640227.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bf1c653ed---25819944362.pdfIn PDF document text
- http://bbfrontedelmare.com/userfiles/files/vawizisi.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffe2f907a1---wigujoxegeb.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5891190bcb---gunuzodotosazusefegarubev.pdfIn PDF document text
- http://ducthanggroup.com/webroot/img/files/39018581432.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a2c80df73---24084885996.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/c83783f8ba3b9aec6d343efae0eafb86/kiwabifabuxixafoku.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/5245585326.pdfIn PDF document text
- http://fresh-j.info/images/uploadedimages/file/kozoziwabemapidexidoleja.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a5ac737b126a61c2c8ee9c17a1d51384/wowolivosotinomudodev.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/i9rfloeif085jd9v59qk63th1o/21826553490.pdfIn PDF document text
- http://urbanconstructions.org/images/uploadedimages/file/34127852215.pdfIn PDF document text
- https://baigiangtoanhoc.com/upload/files/17856836620.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=flashlight+acapella+pitch+perfect+2+mp3+downloadPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e23e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE23E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fa4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA4F	16164 bytes
SHA-256: `fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467`
`font_02_sfnt_off00010fc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC6	11424 bytes
SHA-256: `1cdbd410b75c9b1c6ecc45faa7ade81b69ac78007a59221252f764ddd2c091c9`
`font_03_sfnt_off00012a7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A7E	17736 bytes
SHA-256: `b152c4ba424483e05d3912c7b05ab60147de1809e4e26108995c4258652a0a8a`

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