PDF malware analysis — malicious · 3166bd58725854ac

MALICIOUS

PDF

83.3 KB Created: 2021-08-18 08:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: daccf28130c014a150d9098e2156b033 SHA-1: ab31bcb63b42af59c858c3c341b3381f27401876 SHA-256: 3166bd58725854acd7db4fe926f5a51f2d3192496200f1fec7533ed2ef4e9d44

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=how+to+move+candy+crush+progress+to+new+phone PDF link annotation
- http://stevis.cz/files/file/saxigavanixeguvosale.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/36069783210.pdfIn PDF document text
- http://andlupa.com/userfiles/file/52729549423.pdfIn PDF document text
- https://cahayaapi1.com/contents//files/49200359245.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4e989461---tamesato.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc72200f1---dexabalevinusunoku.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db5bc4cf2c7---nemilijusifi.pdfIn PDF document text
- http://resetimpianti.it/reset/public/file/35442279124.pdfIn PDF document text
- https://dalton-english.com/userfiles/file/fewej.pdfIn PDF document text
- https://commonwealthsportsawards.com/userfiles/file/fuxekimifugitonetujagoro.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3fa81b5f---nojavupewawovubizuma.pdfIn PDF document text
- https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/36f2f201652916c7150a30a3902adcad/7547432212.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/fecc96c67d13dfc3cd2e44304884f539/48352691027.pdfIn PDF document text
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/runazafapujafinufebemudep.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608918b43bc2f---93051155600.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/f68a55e9a3a3e369f8b42358d46d985c/rofalepakozurol.pdfIn PDF document text
- http://resheto.ru/users_images//fck/file/tuniwixaturimiko.pdfIn PDF document text
- http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ab91d77ea---pirosu.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/mosexodofujawej.pdfIn PDF document text
- http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb1e7caf42---posupovujatutebibaju.pdfIn PDF document text
- http://stolizstekla.ru/userfiles/file/kavedaxok.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a0b4d9de43caaefd83e0b42fa8d825e8/46023769834.pdfIn PDF document text
- https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/em6ula4t6se9me26m99d8fb4m7/nefotibuvekula.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93b04eb6d---furuwibaw.pdfIn PDF document text
- http://chemonova.com/FCKeditor/file/3135933228.pdfIn PDF document text
- 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_off0000dec8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEC8	16956 bytes
SHA-256: `d23c8f55f519b20262df7cae521f55dcb4aac43b16a30730beb441b1463cdba1`
`font_01_sfnt_off00010b36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B36	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001234d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1234D	11180 bytes
SHA-256: `dd2307819b8c656df1c58019f1b4411858cc0bc4b873a4686303c7e15c615eaf`

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