PDF malware analysis — malicious · 6bab6f6a409751f1

MALICIOUS

PDF

87.6 KB Created: 2021-06-26 07:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: c65eabd734770322b541088eb5f2237f SHA-1: c2bbabf8fd710b0641acb8848e2a844b7ebbac9a SHA-256: 6bab6f6a409751f161189bfa82c9ef36e1ac89696812d1b151e7c40f0b609a40

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to external sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with the ML_NYX_PDF_MALICIOUS and ClamAV detections, strongly suggests malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 https://queure.ru/uplcv?utm_term=i+am+not+your+perfect+mexican+daughter+pdf PDF link annotation
- https://octvads.site/js/ckfinder/userfiles/files/kexuxakepenekokani.pdfIn PDF document text
- http://aklond.com/UploadFilesfile///2021062301050766.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607072cacdab3---53488823263.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/cece6d5beb16368e38fc3056b7fd796c/92397766453.pdfIn PDF document text
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ev3lb2gh2lksmusjtvkn6vsuq2/fawinepibetowevinoto.pdfIn PDF document text
- https://advik.net/userfiles/file/segiwi.pdfIn PDF document text
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ed8e276a8c463c947b99ae6f3b872be7/vowopabipu.pdfIn PDF document text
- https://circolodelpistone.ch/userfiles/file/fedumud.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/00b60377e01c1324c202499254e6a96e/zoximaninakeg.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/9a630aa116b16f8d22f510e9e58c2231/89362681947.pdfIn PDF document text
- http://sevenseahotel.com/uploads/images/files/17062164569.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378d1630fc---52502929751.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160b2322cedcbe---lowogofavuj.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16083f3cc67e80---vadugijugijikamab.pdfIn PDF document text
- http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/pubabes.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d3b072cab---1572235422.pdfIn PDF document text
- https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/2s795pca6etb32hp66ar9qhrac/74635259409.pdfIn PDF document text
- http://taikenplan.jp/ckfinder/userfiles/files/18692197942.pdfIn PDF document text
- https://hmanagement.net/userfiles/file/7095489927.pdfIn PDF document text
- http://mbcasc.net/imgs/file/gexoguradixadatesose.pdfIn PDF document text
- https://contact-house.com/fckeditor/upload/file/befisedubufidavuve.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/64e27830e628ccca0c97070340f94f99/8201160338.pdfIn PDF document text
- http://hoshitorionline.com/uploads/files/61578933531.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5935254336---turip.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/3a589d60ee27ea870d09e687e2c55b62/vumevugevoxusolovepuwe.pdfIn PDF document text
- http://allaboutdowney.com/userimages/95143067741.pdfIn PDF document text
- http://com123.vn/uploads/file/32861373976.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_off0000f149.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF149	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001095b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1095B	17736 bytes
SHA-256: `81ff9c7ec3d925f2127a77a822cdc3aad072ec520025f12c55f7d99aa5c51c23`
`font_02_sfnt_off000136f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136F2	11120 bytes
SHA-256: `84a5eaed0584bf5c1dc61e08880d8ccfee9a906399b5525b2886a008b99fd99c`

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