PDF malware analysis — malicious · d9bdc47f5f46725c

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 15:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 245f464be972e1881dabe0326644e7d4 SHA-1: 525d4311892592fa4edb9b242dad7291166a3c08 SHA-256: d9bdc47f5f46725c548ec14f1d97321b8b3a0e513e8ade8dd6d9531e29a7ab60

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised WordPress sites or disposable domains. This suggests a phishing or SEO manipulation campaign, where the PDF serves as an initial lure to redirect victims to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://ketchas.ru/uplcv?utm_term=kenwood+multi+pro+fp730+manual PDF link annotation
- http://benthanhsgfarm.com/images/uploads/files/67468724373.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/9c63e2e24e7a03ab37f9cdd5e4171cbe/23652917233.pdfIn PDF document text
- https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ca59af5fbbff56fe8b73c441eaebf58b/bibumukitixopufusakubul.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611bf3e7e652b---simawalilitavumegutizuj.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/1c0143596de278f1b701ccc49460a8c1/93546379941.pdfIn PDF document text
- https://noihoithanhtuan.com/media/ftp/file/68624505746.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ce455e9948ef9de3a6104006afcdbf83/fezazitogu.pdfIn PDF document text
- https://mfdesign.hu/files/file/71291383508.pdfIn PDF document text
- http://rambud.pl/uploaded/file/23130921489.pdfIn PDF document text
- http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/kawozokefulufarenuxidovor.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d18c5221e07---2562455905.pdfIn PDF document text
- https://psychologgia.pl/Upload/file/fipabomuwizire.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/443bd67ceb3c29a0b0d5ba0fd89e04df/miropun.pdfIn PDF document text
- http://aivieksteslaivas.lv/userfiles/file/nibipoki.pdfIn PDF document text
- http://slenderclub.cz/ckfinder/userfiles/files/82873404884.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087901c6f7db---55667175448.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16089c5f5181db---78547861140.pdfIn PDF document text
- http://dhleisure.com/ckupload/files/83641614644.pdfIn PDF document text
- https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/61m8l9cv1m03pjmj64mraqvel1/sesiwafisukatifo.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac863d42e4f---pesuxumaliveduba.pdfIn PDF document text
- https://sunrise-photon.com/upfiles/editor/files/jufegumi.pdfIn PDF document text
- http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/lebugajenidowinez.pdfIn PDF document text
- http://alwaysfavorentertainment.com/clients/879371/File/97435335829.pdfIn PDF document text
- https://yunglin.com/uploadpic/files/86830616734.pdfIn PDF document text
- https://h1t-url12shio-turbo.com/contents/files/fanufa.pdfIn PDF document text
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/4caa1054f5c48d624c56598213455f3a/17793780314.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_off0000dcce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCCE	11012 bytes
SHA-256: `be04eb48b906397de5d5fc1df920a977ad91d1f2a314245e5163749555bcf84f`
`font_01_sfnt_off0000f66f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF66F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E81	18804 bytes
SHA-256: `4eb1e91efcd775c4b3d5eb0fdbf87cf66a57b3ce7af9c901ab65b7d60e1fc23a`

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