PDF malware analysis — malicious · 11f38ee97a982994

MALICIOUS

PDF

81.8 KB Created: 2021-07-07 10:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 32eeb0dbbcac6910f67a9085c5934cea SHA-1: 8291243c1d0ae3b473a265c59a8d707d5aacd0c5 SHA-256: 11f38ee97a982994dd7eba8d1a0131382a7fb2332665b238ccea75772429a5ab

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of links, many of which point to compromised CMS upload directories, suggesting it is a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the nature of the links indicate a phishing or malware distribution attempt.

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 https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/927c4240b47128c38d389d7533ec3460/raxilagubaxapimajonoj.pdf In PDF document text
- https://jurad.eu/files/file/57730615358.pdfIn PDF document text
- https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba5a18332516e55aa3cf9acde04b0e47/zenekopejerususiliru.pdfIn PDF document text
- http://ekonopuntos.com/campannas/file/62592245624.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/b4038820c7baaa9355f5084e6a6851f9/4321401253.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93bfcb6389---fuduwasiwogot.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d8277658766205157908869ed58e0f55/pejevafesudij.pdfIn PDF document text
- http://ewhamd.net/upFiles/ckeditor/files/lagopepumebejasimitaxa.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8f571f9f5---viwetagitudeza.pdfIn PDF document text
- https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b8fa72430---tutemokerevogos.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ae044ab5c---13275967162.pdfIn PDF document text
- http://www.ecostroyservis.ru/File/rupupefabuweruliv.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/123df80b66e9f8f7acc86f5dbc0c80df/mazekorogogesapetujuniw.pdfIn PDF document text
- http://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/pevinol.pdfIn PDF document text
- http://sdds.be/userfiles/file/8480944900.pdfIn PDF document text
- http://dansensvenner.dk/imagesfile///88348136216.pdfIn PDF document text
- https://atamergranit.com/userfiles/file/pigifovakegedisopewuginiv.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d07111b2b---6597339779.pdfIn PDF document text
- https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/2ohdvtf5955t0u740ls4detss2/kupimaxin.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c77caaac13d---tubiterato.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/08bcaa0777ebf74c729581c229401890/darejukinotoxizus.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a85ce00a64c---29236394961.pdfIn PDF document text
- http://turagent007.ru/userfiles/file/67114685781.pdfIn PDF document text
- http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vesub.pdfIn PDF document text
- http://aircond.md/upload_fck/file/bekoraxewute.pdfIn PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/gprnb5didppq92lgtscqkkrk19/fedatidevopufo.pdfIn PDF document text
- http://global-insurance-broker.de/downloads/78022509054.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=example+of+staticPDF 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_off0000df51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF51	10520 bytes
SHA-256: `eeb398411452cbf8f2530e0a0d539105dcb9bcc7f4f6e90b2ce14dbc65eaeb22`
`font_01_sfnt_off0000f754.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF754	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010f66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F66	16024 bytes
SHA-256: `da318342aa120f933223f40e7f2702312b23463a3872c7cc280e1ac00d431041`

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