PDF malware analysis — malicious · 463eb6f3cf56d582

MALICIOUS

PDF

87.6 KB Created: 2021-06-29 08:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 6c5405b0eed4d4eba705a08e24ceea44 SHA-1: f798de3956008ebd9ac289afbc91852ca444ee82 SHA-256: 463eb6f3cf56d5829dcc9d5adb8918ab761399193864e29bf96cfb9001af06f1

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=my+ultimate+goal+in+life PDF link annotation
- http://stolizstekla.ru/userfiles/file/64321088112.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d427f7f3f5e---97966995017.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfc9f80432---sovatiloduzoxekakerujawo.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afde9581f3d---bedolojoxobuxen.pdfIn PDF document text
- http://airholic.com/UpFiles/WebEditorFiles/file/womepaponanafijipef.pdfIn PDF document text
- http://motorlustor.net/userfiles/file/89187151897.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160763f6a1966d---gajam.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5f9041abc0a30ad6bedaa0f85b59be84/36329684774.pdfIn PDF document text
- https://terminal.hr/userfiles/file/lapewujalavujiwuzowo.pdfIn PDF document text
- http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/zikuvisetapobegad.pdfIn PDF document text
- http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f2746a40f---1386652737.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3b18991d34a224e8835ddbad3f5f62a5/vifunorozefope.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b69a7cdab---8345821383.pdfIn PDF document text
- http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/lejananu.pdfIn PDF document text
- https://eltonltd.ru/sites/default/files/uploads/kolalifadosebubowi.pdfIn PDF document text
- http://entryexpress.online/chapter_images/files/narolijedesof.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/voxibijawabubejokirakur.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/rh8o8dq8mi0sr17mrd986f4pp0/64783687617.pdfIn PDF document text
- http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/86494539140.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb5337dcfb---tuwujuzefab.pdfIn PDF document text
- https://gyn-koe70.de/obrazky/file/dojazitokexelaxagupo.pdfIn PDF document text
- http://ip-golubev.ru/ckfinder/userfiles/files/nunefugotidafefepegolor.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c57ad14e---rukojosodetabinaletifuz.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a48398caa08f8486f2d438dd456e50fa/57379589127.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_off0000f408.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF408	16964 bytes
SHA-256: `f98f03ea05ebf0103ea57d1f1902280ab9b76c8352f7e9f3b2271ef01c31963c`
`font_01_sfnt_off00011fab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FAB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000137c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137C2	10496 bytes
SHA-256: `bc1099a06cbefd6498cfad245e15a5f833304509bc284a4dfc11199425957adb`

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