PDF malware analysis — malicious · 94ff6c790a598566

MALICIOUS

PDF

78.8 KB Created: 2021-07-19 02:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 37f49231fe61e8b321f2e8b398eb8b08 SHA-1: 98dece69940efde01dd8f0a8ca6b0b2d9b2f84c9 SHA-256: 94ff6c790a5985666e9b156bdffcf261d1dcaa0bedc1dd4515b18686cf664472

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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.
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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0db1d36818---salevatawazid.pdf In PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d88e1d813a9---xepikupumawexaratozarog.pdfIn PDF document text
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ppgfntcqr8vecm67l0vo6u617l/21270349728.pdfIn PDF document text
- http://yangpupark.com/uploadfile/files/56206549131.pdfIn PDF document text
- https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/94cae654b224472681e287ddd5aa9a1d/fepukovekanikixifodupatoz.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e51e7022616---fevabefagukozikupomowo.pdfIn PDF document text
- http://poiskvod.ru/images/file/98459299508.pdfIn PDF document text
- http://proxima-design.cz/files/file/sebinojozoluxik.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/37d253b39621852410adda2f29e1baac/newiwajagirudilenuwojux.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ea8d451e6---1874860075.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b382860839---46251376880.pdfIn PDF document text
- https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/408dd0b2efe585fa7334fbcc476ad700/1316959270.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609443a7b3eba---susolajesesaxawegivisaru.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/lklhh41rg7j3qouj7fe9citlo2/53707997045.pdfIn PDF document text
- http://specimport.by/files/files/bepijedugobew.pdfIn PDF document text
- https://sjalikave.hu/pictures/file/xulubu.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/i14k5lhcopk6putsbrqt4kk0k6/lomofevanemidonaf.pdfIn PDF document text
- http://www.florentmaussion.net/userfiles/File/73779633325.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/07d3aa9bee6451bf0fdc2c2f6eed1d40/51263672586.pdfIn PDF document text
- https://mfdesign.hu/files/file/mixabusolisala.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/22805040569f31f65ecd60a468234047/kafivaruxedazisev.pdfIn PDF document text
- http://s-privod.ru/userfiles/file/18156362619.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723158aad16---98686317714.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89494a546c---silidobunizepenometobo.pdfIn PDF document text
- https://sunnyvale.com/wysiwygfiles/file/demizuwememuvofodunun.pdfIn PDF document text
- http://gallery4walls.com/upload/editer/file/zoxotezozasalininixepowi.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609626c5010bd---47027277582.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=gult+meaning+in+tamilPDF 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_off0000d312.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD312	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB24	16760 bytes
SHA-256: `dade14ddc0148bc4daf4c25b4a86b2151be27a34604743f59c53f6a61013e121`
`font_02_sfnt_off0001170b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1170B	10204 bytes
SHA-256: `333b0e653b7ee8f240984a9c9c078ed9a3fbbb808ecdaf112f242777b35cdd00`

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