PDF malware analysis — malicious · 1c5c833ee31ae027

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 00:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2cc7de8c66b974d0c705dd4528052733 SHA-1: b8e759b1b9f3d1b078eabb474763a85160440a4d SHA-256: 1c5c833ee31ae027f7807882aaae9ded5e24675b96069d430c8b350169e602e5

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No specific family could be identified, but the techniques used are consistent with common PDF-based lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

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.
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 https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/3efe5285729b04c0cef7236a3b833d15/51652485413.pdf In PDF document text
- http://wildpflanzen-planung.de/file/puvajo.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q2iup80nvvdb2jjq8rji0g3hi4/32870551457.pdfIn PDF document text
- http://autofactory-jin.com/js/upload/files/dubalinomazuwogagakebuga.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/8d48e64252a249be37aca75027dd2c96/tavegi.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/r6bs1g9fc0bdvmvt84u74ugi9c/46132955621.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/xuwofubiwesu.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b28f203b9a5---posubetoraxopabarenejo.pdfIn PDF document text
- https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/garufebimuxofimok.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/a930df5d237a1a2666c2266d59586e2f/lisoxogapugufagifidovasu.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/84c676e4120df23b3eabd7bbbf411a42/3722904818.pdfIn PDF document text
- http://ever0036.com/assets/uploads/ckedit/files/20210528204455.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/nirbheq8ca12i4f0k6vvi9isk4/lojiku.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/de98a55b5ed4ac62190bace91d32ee2a/6336951305.pdfIn PDF document text
- http://malopolskiszlakwinny.pl/upload/File/nirak.pdfIn PDF document text
- http://teresachild.com/upload/files/rajabixuluzax.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f024975a9---judubexapimimi.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/01309eafc6610fda226c468d148d52ad/8107677995.pdfIn PDF document text
- https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/81b66e0198288feef79bc0ab07392287/duwelifidudupeziremuviw.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/6f31aa952e408c6aa4a160b9a54cf6b5/78523882278.pdfIn PDF document text
- https://drishtinetcom.in/FCKeditor/file/46469439772.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/4004df7acf01738c6c795058a767a70d/nixulelipinimo.pdfIn PDF document text
- https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160898a3e744f7---ririfik.pdfIn PDF document text
- http://konditsionery-reutov.ru/upload_picture/file/kojuwavalafujawaru.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=poison+every+rose+has+its+thorn+chordsPDF 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_off0000e040.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE040	10604 bytes
SHA-256: `c1c85efd940c1c8fa818f7654554ab287764582f08accae93004f8f804a07f16`
`font_01_sfnt_off0000f880.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF880	18168 bytes
SHA-256: `cd8d1a914b87f91bceadc89ade2171bb7698652ad399c5477088af20b5364530`
`font_02_sfnt_off000128c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128C3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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