PDF malware analysis — malicious · 8b34f66a731aa72c

MALICIOUS

PDF

83.8 KB Created: 2021-08-10 12:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: f8a767ffa3ceb9359134eabbb661056b SHA-1: fc3d2b87e6025b0a8a6281b1308ec9bc6df7a9ce SHA-256: 8b34f66a731aa72cb5f9d0173af811cb19898e89affd0cb5e1d15e03fd641c21

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9925

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 https://lapalettedesarts.fr/gestion/file/bomizujipisexorub.pdf In PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/1531bc7146a0abbfd03035468fc8ce08/91970118033.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/wigilegu.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/f1bec69731df29640217b6f3a6a0cb71/59646436080.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/35623958565.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd3083e89a---65926801582.pdfIn PDF document text
- http://salt17.com/userfiles/files/96201916538.pdfIn PDF document text
- http://tieuhocsondong.hoaiduc.edu.vn/ckfinder/userfiles/files/riridoluwobukizuramudaju.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f0d8a3ce4---jawerawudiwedifenafer.pdfIn PDF document text
- https://cdmsig.com/ckfinder/userfiles/files/jikavog.pdfIn PDF document text
- https://chetanaus.org/bheru/uploadfiles/file/56044981093.pdfIn PDF document text
- http://villa-carlshorst.de/sites/default/files/file/14487328902.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5faf64c609e021ac32624a0456c7f6bc/79107130041.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a84fef290b0388b2d7f57212fa83c8ce/69308049944.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/xebujelijesuzagowuv.pdfIn PDF document text
- http://daydala.com/userfiles/file/64796256154.pdfIn PDF document text
- https://adsbudget.net/userfiles/file/nedev.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/d38n62ip5bg190a7ftj2uotifn/vakiwuvefufedikubonedelo.pdfIn PDF document text
- https://dutchfansitenetwork.nl/ckfinder/userfiles/files/fakepivibedomin.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fce591c16---pavakokaxibalusexupesa.pdfIn PDF document text
- http://www.logomarcanet.com/userfiles/file/pemukuwekugenogevifos.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/d28c019719e7d2af4c38bec82dc7b74a/14584860801.pdfIn PDF document text
- http://epwuae.com/userfiles/file/takebexosuwilapixudefujo.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb2f2690b4---lamurovuviledir.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f72e66a8312---texubifoset.pdfIn PDF document text
- http://immobilieninvestors.eu/userfiles/file/89632602824.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=queen+size+bed+ikea+dubaiPDF 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_off0000e55b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE55B	16288 bytes
SHA-256: `52baff6edf5e733554ab615693695ff94d50e36f9a1ff94c08e7ddcad8caabf8`
`font_01_sfnt_off00010f61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F61	10328 bytes
SHA-256: `360b55a9d5f0cfd3f92e656b4b941cb1b489c0807333f6cf97afb6c899f98851`
`font_02_sfnt_off000126f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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