PDF malware analysis — malicious · 7eeee9eed133a973

MALICIOUS

PDF

80.9 KB Created: 2021-09-17 18:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: d3f92d4e1ece479ac675e5511eba97f6 SHA-1: 67f913517d255e753a81688c28b935c2b1e73747 SHA-256: 7eeee9eed133a9737f22679d40c278bdfc4a0e3eec4fcd51de6ddcc62118d2fe

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users. The 'SE_URGENCY_LURE' heuristic suggests a phishing pretext, and the ML classifier and ClamAV detection strongly indicate malicious intent. The file likely serves as a lure to direct users to malicious sites for further exploitation.

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://synerhu.ru/uplcv?utm_term=8+ball+pool+ios PDF link annotation
- https://mmeasar.com/mmeasarfiles/file/83717966772.pdfIn PDF document text
- https://mamotato.ro/userfiles/file/83978570204.pdfIn PDF document text
- http://wumag.pl/userfiles/file/taxonibawoxadajiwitiwox.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/45249119589.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133ab4694393---31889618619.pdfIn PDF document text
- https://szekszardportal.hu/userfiles/file/gulenixumaxudofudo.pdfIn PDF document text
- http://www.ruben.pl/ckfinder/userfiles/files/punifupivimokoginuxafex.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131f94e66131---25367453433.pdfIn PDF document text
- https://ikomsolutions.com/admin/userfiles/file/munutabivomopavekarunow.pdfIn PDF document text
- https://songod.vn/uploads/image/files/90849286502.pdfIn PDF document text
- http://nfrostov.ru/upload/files/94273321864.pdfIn PDF document text
- http://chanakyaaerospacedefence.com/userfiles/file/lepulogot.pdfIn PDF document text
- https://asiantms.com/ckfinder/userfiles/files/80972023490.pdfIn PDF document text
- http://thaisomboonautopart.com/userfiles/files/80128579925.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/62213685063.pdfIn PDF document text
- http://www.brickchamber.com/ckfinder/userfiles/files/rozuvobi.pdfIn PDF document text
- http://www.icareonline.net.au/ckfinder/icare/files/gobilotariwurumobi.pdfIn PDF document text
- http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/forotenetuwalamobejobegaw.pdfIn PDF document text
- https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/67791800365.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419917e4aac---4519824995.pdfIn PDF document text
- http://simkoongschool.com/uploads/editer/files/86697964422.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a7fbd3289---vawom.pdfIn PDF document text
- http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52075947237.pdfIn PDF document text
- https://stmpallet.com/ckfinder/userfiles/files/metawifesiwepisimirivujux.pdfIn PDF document text
- http://grupophi.es/uploads/files/33779388244.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_off0000da13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA13	17520 bytes
SHA-256: `7fb760a0f1e2760733f9ca7cd218d160e7370f01d7c158ac41e535d1d61ecb1c`
`font_01_sfnt_off000107aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107AA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011fc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FC1	10064 bytes
SHA-256: `36d2e3ab5001a5f23f475db86646b8477f694b2c18909732417ce9cbc12bed97`

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