PDF malware analysis — malicious · 4d2bebf738ecb321

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 14:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: b0f2e73149a77f7486eff62d4a298bcd SHA-1: 4e02d622380c9b67d79409bdca11a94392e4bd5e SHA-256: 4d2bebf738ecb321494fc6eabe1c461998ea53a484b6a451baf38ecc450f7395

164 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9925

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 http://spamsmsgiare.com/media/ftp/file/85384608897.pdf In PDF document text
- http://bindashnews.com/userfiles/file/nomonize.pdfIn PDF document text
- https://planet-for-events.de/userfiles/file/7433175394.pdfIn PDF document text
- http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607035b76abec---93661548240.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e056835f431---8233841797.pdfIn PDF document text
- https://cuisinescartier.ca/upload/editor/file/97687341619.pdfIn PDF document text
- http://weilandvloeren.nl/fckimages/giwadarodivutebal.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c598f23296e---19518931151.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d210977d8---vibodalogexapizozorarazel.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/g8i07diabbrodnh1c0l5h3qul3/83640531202.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/a4ade2943c37c2f8d7d498a3df3b0e93/91578156943.pdfIn PDF document text
- https://gtselect.fr/ckfinder/userfiles/files/soxalijamebi.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/genubugogibuz.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/0774a1f79912d47643b261f5c7a3f49a/90408364684.pdfIn PDF document text
- https://clubberia.com/js/ckfinder/userfiles/files/xapugadalovanap.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c5cc5bdeb---tazarixozenamev.pdfIn PDF document text
- http://asfcursillo.com/clients/879797/File/75689570087.pdfIn PDF document text
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7055648b763c56bf497473207f230079/95197100799.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb720068b1e---7430997703.pdfIn PDF document text
- https://k-newsletter.com/ckupload/files/topizi.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/366uqbn3a5b1cus1jnm97h6g65/23338914618.pdfIn PDF document text
- https://sluganarodu.org/userfiles/files/76849842258.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/bf4kg38jps3v9u95o46n0296lp/29962416172.pdfIn PDF document text
- https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/237b27321b2ed1a77531b0e66e42bab3/noropemev.pdfIn PDF document text
- https://denizlihorozu.com/resimler/files/88704861323.pdfIn PDF document text
- http://kpotplace.com/uploads/files/dafowutatixapanibedenaseb.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ghost+tri+bully+pricePDF 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_off0000de96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE96	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6A8	17720 bytes
SHA-256: `26e0ccd5b0f6b45dc1ed52d3b9522ced72f0a0680db14d6b9ea3eb8058e31e86`
`font_02_sfnt_off00012496.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12496	10600 bytes
SHA-256: `c622f19a09f2f215bb681c7c0786527dac076a271de6931c8d469532e6451afd`

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