PDF malware analysis — malicious · 08422e9535e207ae

MALICIOUS

PDF

82.4 KB Created: 2021-09-10 21:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: a72443df742f5c2b2288daa6b799b296 SHA-1: ec72223bc1cc0d9880aced7f057b7e3458832308 SHA-256: 08422e9535e207ae3d642c3ec1b63d7b20b73b8ffd60bc25caaf6277ebd10f54

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to various domains, some of which are associated with compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=real+mv+master+app+download PDF link annotation
- https://mytshirtcreator.com/app/webroot/files/file/ruzubonigujurupepe.pdfIn PDF document text
- http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/doniratagedavido.pdfIn PDF document text
- http://bnblspecialities.com/userfiles/files/20864629640.pdfIn PDF document text
- https://marmetal.cevhertemizlik.com/userfiles/files/31355489354.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b6a8eca11---56716434943.pdfIn PDF document text
- http://www.anaja-inter.org/public/file/23800284974.pdfIn PDF document text
- http://tunapvietnam.thietbiotoviet.com/Images_upload/files/rapajijekiveza.pdfIn PDF document text
- http://clairvoyantinfotech.com/demo/images/44485045940.pdfIn PDF document text
- http://paykaaluminiya.ru/ckfinder/userfiles/files/fuduvim.pdfIn PDF document text
- https://www.temtechnologies.fr/ckfinder/userfiles/files/31117258833.pdfIn PDF document text
- https://nepalonlineexam.tisaracademy.com/userfiles/files/28909001778.pdfIn PDF document text
- http://samsungdvm.net/upload/ckfinder/files/50061926954.pdfIn PDF document text
- http://kingalbertltd.com/uploadedfiles/file/38580624020.pdfIn PDF document text
- https://jasz-pap.hu/UserFiles/file/gazakepamubewu.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312aff4f876---70124955781.pdfIn PDF document text
- https://cplastik.eu/data/cms/file/960546300.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343d91bcb01---16749051621.pdfIn PDF document text
- https://anitt.in/ckfinder/userfiles/files/48571845981.pdfIn PDF document text
- http://hit-air.pro/ckfinder/userfiles/files/10555809841.pdfIn PDF document text
- http://hasanmasat.com/ckfinder/userfiles/files/89045022536.pdfIn PDF document text
- http://asiavent.com/UserFiles/file///neseloxevusufamojanuzised.pdfIn PDF document text
- http://infinijewelry.com/userfiles/file/51336377166.pdfIn PDF document text
- http://interreg-ipa-husrb.com/downloads/fetukovipof.pdfIn PDF document text
- https://granitnet.hu/editor_up/63184643977.pdfIn PDF document text
- http://honderhotel.com/UploadFiles/FCKeditor/20210903043118.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dc4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC4A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f461.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF461	10660 bytes
SHA-256: `3657494900b0e93c59adbebe9ec6623071afc709071ae549feee1c4fbf6216fc`
`font_02_sfnt_off00010cd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CD6	18176 bytes
SHA-256: `eb1abe5f659833d571903efdc8ac920c1dd22e5ed066c86e34de3e6a727265d5`

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