PDF malware analysis — malicious · 8c423be269ce0f95

MALICIOUS

PDF

77.5 KB Created: 2021-07-02 02:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-07-10

MD5: 56f32494cc0447af6aa42ecb0cdb4483 SHA-1: 4aa10185a4c43c2ea98e67a6de07791958b9648a SHA-256: 8c423be269ce0f95610a8b69b20e3f5c3769f4c2c1731ba574fc84ce1dc444e2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These sites appear to host further malicious PDF files, suggesting a multi-stage attack designed to lure users into downloading additional malware or engaging in phishing activities.

Machine Learning

Nyx PDF Classifier malicious score 0.9829

Heuristics 6

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.
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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885efaca782---80323905663.pdf In PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb61ccca6---nukimuzomu.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49618c9a96---36265046456.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4df8a4c93---zolivu.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6eeb23ac6---7046807313.pdfIn PDF document text
- https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/6macfv6rgmesf237gtumauirm1/35825571549.pdfIn PDF document text
- http://diversecityuk.com/userfiles/file/12008019268.pdfIn PDF document text
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/72370a493a53a8a7e0d16be63fa17975/pinikab.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ff9a36c2e77e39f836ce07231302c8b6/18546068292.pdfIn PDF document text
- https://aartipalette.com/userfiles/file/tuwawedap.pdfIn PDF document text
- https://secolink.sk/userfiles/file/suzaxijodo.pdfIn PDF document text
- http://stalmont.eu/userfiles/file/rotowadijisada.pdfIn PDF document text
- http://fritz-fahrlaender.ch/download/logobevumenonozaki.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/90732406743.pdfIn PDF document text
- https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/5274ec9818a88e1dc2c83b53c59225e0/293714716.pdfIn PDF document text
- http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/levowidebunipasobig.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/0c554120e91106a3587f5fc46ad34e5a/87135184156.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f463ed95a---nigiwiluvapatuve.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609f17ca73fe7---27060492891.pdfIn PDF document text
- http://resortcrimea.com/ckfinder/userfiles/files/10566970994.pdfIn PDF document text
- https://etonbio.com/newsLetters/images/file/22417374486.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/86946fb8b65493d0f52b76a05a680b30/10418153596.pdfIn PDF document text
- https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/oftt161hi7ha716alhf7m5sc81/mivifagelubavino.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/fb7684b84f83751a4f3384258712440a/rupozazotok.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/95e9d2159d03b4f37461df7cffc907d8/31190350281.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c2847e86f---napozi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=molality+of+solutePDF 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_off0000cd3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD3D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e54f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE54F	17084 bytes
SHA-256: `62a76f226a0a972bdebdecbcf687933b6f6bd3fe5d64e240702f75207390cd1d`
`font_02_sfnt_off000111cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111CF	10208 bytes
SHA-256: `ae55c843622fb9bcf00e8ebfbcbe6b3f103b402eebe39c8ac752096a8c09ef4d`

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