PDF malware analysis — malicious · fff64f2e9345133c

MALICIOUS

PDF

79.7 KB Created: 2021-09-03 16:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 7ea17292cd15df9c5c7eec8da5b87666 SHA-1: 02428095b901cd76fe54d59c1e7658aa27eb45b5 SHA-256: fff64f2e9345133cfafc96d79cc05abc241147c729ba257754cc1d4795dad429

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a strong focus on hosting malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://dutchfansitenetwork.nl/ckfinder/userfiles/files/95129792788.pdf In PDF document text
- http://fskyok.com/uploadfile/files/xopumoxolo.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a22e93f2153cc3f2a531548f2c276f81/sefumepedibokimanofel.pdfIn PDF document text
- https://saleskerala.com/ckfinder/userfiles/files/38945566672.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/00nfp5vsb8durnaab4njstnmrm/pozabepeninikajetipakaj.pdfIn PDF document text
- http://taiwanglassgroup.cn/userfiles/file/saxurubotonunonepozop.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/sue93gvbsc2vo7n87b4j6pbhim/gibolafapimizuvamulofug.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607813ae90ed4---37483798703.pdfIn PDF document text
- http://mmcaana.com/clients/29274/File/bowomun.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/53686428704.pdfIn PDF document text
- http://tiga.co.th/ckfinder/userfiles/files/pareripe.pdfIn PDF document text
- https://demircanticaret.com/userfiles/file/sonugusukokepamirapatox.pdfIn PDF document text
- http://crm333.com/documentos/file/wepajutafujuganeves.pdfIn PDF document text
- https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/v1g9ml48f8mah22lmoq6ngl5nr/mogowelaf.pdfIn PDF document text
- https://almudenafernandez.co/ckfinder/userfiles/Files/dirasajaji.pdfIn PDF document text
- https://fl-forever.com/upfiles/editor/files/1129449811.pdfIn PDF document text
- http://achilleferolla.it/userfiles/files/46827691863.pdfIn PDF document text
- http://studiotrusso.it/userfiles/files/41160608021.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081093d98fef---11855308066.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/52cvc9q9eep1noa1elgipel23f/33275200167.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160749a7b23e92---kogigafiwujanenifulefizaz.pdfIn PDF document text
- http://mintaialuminum.com/d/files/pewifinizipenopute.pdfIn PDF document text
- https://myshalewell.com/userfiles/file/81888701742.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608ce4b05a73e---786460972.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-6/file/4637542855.pdfIn PDF document text
- http://german-ex.com/images/blog/file/57873896021.pdfIn PDF document text
- https://gea99.com/ckfinder/userfiles/files/25061744191.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=phthalimide+synthesis+pdfPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d425.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD425	10660 bytes
SHA-256: `df1e19309b849a20e751808639669165e15ee96460dd3d214a1bb3e8b237e73b`
`font_01_sfnt_off0000ec5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC5C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001046e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1046E	17224 bytes
SHA-256: `2170630ba18b82ce0751aaae579c273dd3c1c090bc1cc05551875ad3d4682882`

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