PDF malware analysis — malicious · 9fd761a758450265

MALICIOUS

PDF

109.6 KB Created: 2021-06-30 04:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 1b2463d0d79ee337a9e7bb1f77ddb9ec SHA-1: b870dea640eb5481e5396d4d333c2ec385db021f SHA-256: 9fd761a758450265090b14b748d306b3ea25fa705e11132e94796875f8a1a957

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a 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 suspicious score 0.4560

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.
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
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://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099f6e215a80---2977970248.pdf In PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/7a0c42f32a6110c2d8c583be971a4b74/60168144285.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d17ee1641b---53960798719.pdfIn PDF document text
- https://svingenieria.cl/userfiles/file/lijozewav.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783040d0228---58951346247.pdfIn PDF document text
- http://jpind.pl/userfiles/file/46232846347.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160729d3a1380e---59710195368.pdfIn PDF document text
- https://bnovum.hu/downloads/gokubibinotifisuwano.pdfIn PDF document text
- https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/739d62858b58205f239075e0fbdc0c33/31819471436.pdfIn PDF document text
- https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/6c5ca4a7c437deb5397cfc336a77965f/39673650664.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/keravoserumivikukijibegux.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7b9896d1e24cab66b3dad607245e7f76/94232304845.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f0cf973af3a03b3037340fbae98c34b3/muvever.pdfIn PDF document text
- http://cathugo.de/res/wysiwyg/file/11227877870.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ad610h691d4jdiicr24pgkqqt7/rulosizutid.pdfIn PDF document text
- https://argumentua.com/i/file/vumawuluruwurakez.pdfIn PDF document text
- http://gaishachuukobuhin.com/js/upload/files/8452275532.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160750d774bb1a---7241596507.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608675d70e643---texar.pdfIn PDF document text
- https://lavaecucebrescia.it/file/regugaranuwideduxorukide.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f240b577e---98666472714.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/1a0a744789e666769b0fbbfe712323b2/43128291308.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609846dded0ee---89520939521.pdfIn PDF document text
- http://magnachip.cn/userfiles/file/20210513091155.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0v80av20pkfh9tcuf61mad2k04/55709516946.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=good+moral+quotes+in+englishPDF link annotation
- 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_off00014c21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C21	10980 bytes
SHA-256: `e0af079d2800beea7cd22dfb5588aa4a7e64a712312a461e79710b17e7a513b1`
`font_01_sfnt_off000164e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x164E5	16256 bytes
SHA-256: `d3adaa93df72ef2fd84922e963c41a1d95d5332105d64271bea072462b463591`
`font_02_sfnt_off00017ae2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17AE2	20140 bytes
SHA-256: `5aadb1cf39bef56db3de51764aa0d43a3e7d68b0ab89f63012f7a873f759f0a6`

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