PDF malware analysis — malicious · 5e3923edda96af7c

MALICIOUS

PDF

84.0 KB Created: 2021-06-27 05:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 25f54a483d5698b2611c063fa835a3b1 SHA-1: 65ca2cedc5056611519a8eb27219fc99672e25f3 SHA-256: 5e3923edda96af7cf4f4ea709ec2b16ec62b90c9f55b6924c74daca77f27a548

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, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, likely for distributing further malicious content or conducting phishing attacks. The presence of multiple links on disposable hosting and compromised CMS upload storage reinforces its role as a distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce8a02f446---16832735730.pdf In PDF document text
- http://pizzeria-millemiglia.de/app/webroot/img/editor/file/sikina.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606dce050ecb6---dobudowuwirebalotedi.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/g9nn09njprjjsf7i2vdfv7e59p/53411340445.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f54503d155c938cac4a672aaf47f3f5a/54008564527.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/ace57bb3c764f5e8f738355f08ef1648/76751650059.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e62d0c24f---42100375346.pdfIn PDF document text
- http://arniestribu.com/campannas/file/14889671838.pdfIn PDF document text
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d7b3c67d3018c463c14e146ed69be63f/15185446154.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc7860d236---sizivudugasezegunedoni.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a073751cc3e---sezuterekiwolegepid.pdfIn PDF document text
- http://papianiarch.it/userfiles/files/zagijofizuroladamipu.pdfIn PDF document text
- http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/00a0822040eb2f54a6158b085dd783df/gelijagabibixivakel.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e0944402e671d0e41cc4b23ec009e83d/29737009103.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609623ae4e1ea---virajelilabedogaronujuv.pdfIn PDF document text
- https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/4e12bca34be926189e7d35ba496b1fd6/30358045156.pdfIn PDF document text
- http://kotolantopeni.cz/file/datowiwinozavemajazi.pdfIn PDF document text
- http://gwhs79.com/clients/867100/File/83845210876.pdfIn PDF document text
- http://pro-elec.ru/ckfinder/userfiles/files/46930501983.pdfIn PDF document text
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/n89b07hj1buamvv1atb4tin949/7396224276.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae303cca538---93570679735.pdfIn PDF document text
- http://didula.com/img/file/99434883194.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/4qsl0gkco3lfg86js2pid893i6/wusoladap.pdfIn PDF document text
- http://nail-free.com/ckfinder/userfiles/files/tupaki.pdfIn PDF document text
- http://bobas24.pl/Upload/file/1224596541.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/b25ofmtud720j28aaboametk1t/nulimozivuvalit.pdfIn PDF document text
- http://nousgarage.com/userfiles/file/4114454457.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dynamic+pawn+play+in+chessPDF 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_off0000e464.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE464	10520 bytes
SHA-256: `dfcb6786205e93b309f823086f465c7170ff4a5fc4126abba90c64a18827327a`
`font_01_sfnt_off0000fc35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC35	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011447.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11447	17556 bytes
SHA-256: `883eb837058e2cc45c3575c3416985aeb76db6760dfdbf174e2f1e2552905d15`

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