PDF malware analysis — malicious · dcc4610b398a702a

MALICIOUS

PDF

85.4 KB Created: 2021-08-20 02:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 54013ffb0a526eec3c9d6e34c5ddc0ae SHA-1: a8ee0805470535fcbd15f68b75755ed0f009ff4a SHA-256: dcc4610b398a702a6d38c589f4672fb47b9c78de3d1e9826d094a8f4b4c505bb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads, designed to direct users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to exploit user interaction via malicious links, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://siamsankyo.com/Uploads/file/39292532525.pdf In PDF document text
- http://darienhigh70.com/clients/878490/File/lefupa.pdfIn PDF document text
- https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/bi0gt109kgk3r9v4v0l2m0k304/21775526681.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/d8cc3lr5r7epl4o8qcccbqkrjj/70721762247.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927ee31cb10---vimiradanigusigubezak.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160864ae138430---6880587638.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b32fe6528f1ba8342da094b75786bea5/33942769372.pdfIn PDF document text
- http://www.centralperdana.com/file/fivibonerulojedijefebula.pdfIn PDF document text
- http://gaineyranchaz.com/userimages/65051347536.pdfIn PDF document text
- https://satuldelut.ro/ckfinder/userfiles/files/talido.pdfIn PDF document text
- http://fittbikese.hu/files/file/vefebik.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/2285333293.pdfIn PDF document text
- http://permanentnimakeup-brno.cz/userfiles/files/pakopenilit.pdfIn PDF document text
- http://aedelsur.com/contenido/files/nulenira.pdfIn PDF document text
- https://infypos.com/infyposcms/media/xovudebejumewev.pdfIn PDF document text
- https://creteotels.gr/FCKeditor/userimages/file/81644922516.pdfIn PDF document text
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079bc60181d4---3582944315.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66bd5b7519---nafewisemazosowijasa.pdfIn PDF document text
- http://prestopc.it/upload/file/famomejine.pdfIn PDF document text
- http://halmar.info/userfiles/file/77770038045.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086556125da7---bepizip.pdfIn PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bk393cigfjubo8r9c8qbe6ed4b/xofogabexofopukunep.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/tbrfu8bsdg527gr4c7h9r5si23/42259028135.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a43978f127d48f6bbff58275a54dccc4/99834970812.pdfIn PDF document text
- http://capmar.eu/userfiles/file/nakejok.pdfIn PDF document text
- http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/4eab2b70cd1b7ae403c11b5a56f0b1cb/xuridajokezuvag.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=weathering+with+you+1080p+google+drivePDF 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_off0000e6fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6FE	11244 bytes
SHA-256: `8f3ccb51da016ceecd91e0f14616d2f30d2ab0ef82e6c60ca1df9bb737a9968c`
`font_01_sfnt_off00010128.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10128	16864 bytes
SHA-256: `a7788080f883199df9cfbcf388313c2c8f432d500cf8e9bc4abe82c434737898`
`font_02_sfnt_off00012d24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D24	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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