PDF malware analysis — malicious · 65a266c869894eb0

MALICIOUS

PDF

85.6 KB Created: 2021-07-13 06:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: f226c0e9e768f28967e9bf93265a8b28 SHA-1: 2e0ad796376513dfcc04e4ff0fb6600676e88dde SHA-256: 65a266c869894eb07ea173fd13821bac0409c89a3c459dd7f7e128f5df0ba3de

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The PDF structure and embedded links are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=porter%27s+five+forces+strategy+analysis PDF link annotation
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/29pek0f22sre5tsuhjk4obep7q/fivavetuxinoxojusewo.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pvs7bat1bpscrlgfb6p4er2pi1/xewotigukita.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869976b5d89---rozuvivodudukijaponi.pdfIn PDF document text
- http://mynigaoe.com/upload/file/20210704004654.pdfIn PDF document text
- http://jonmechina.com/ckupload/files/zidibageponubanez.pdfIn PDF document text
- https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/495bc05266e0a49b1ec9936853d2b0d2/niwewoxexuguzizow.pdfIn PDF document text
- https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609765ae088fd---92841049407.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0268358ffc---19764006508.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608678cdab0b8---9165974419.pdfIn PDF document text
- http://asremajazi.com/uploads/files/70605254366.pdfIn PDF document text
- https://creativitagh.com/pevron/www/img/file/99880567769.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a8b7aaba3---vipepekadidixobizaj.pdfIn PDF document text
- https://soudurelauziere.com/upload/editor/file/doxigo.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9ae3ba87990877b1836bb3731249269a/22587508189.pdfIn PDF document text
- https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/sgds5n6n362r9btfgvg9e2jh1u/26896056822.pdfIn PDF document text
- http://icsbc.ru/fuploader//file/zupeboliseb.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5b41d2360c57d2540602c8372af0ecde/14351565068.pdfIn PDF document text
- https://client-sms.com/ckfinder/userfiles/files/99691410460.pdfIn PDF document text
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/18c408f81a6e63139158431320790c8c/90921542334.pdfIn PDF document text
- https://gute-reise.ru/i/files/files/wusile.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969105d918c---vabusakaraxunufega.pdfIn PDF document text
- http://clinical-pain.com/pds/userfiles/files/lavoratapugonoparoboj.pdfIn PDF document text
- http://coiffurenais.com/userfiles/file/jonasiku.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d35a814e---piwuk.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5475bcc50c40aea7e088df34386889ff/jupamoj.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_off0000ebba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBA	10728 bytes
SHA-256: `c7ea2349a3e0ef3205e2e632a2d03322cd2a12bc3b33b5a8c7dd4b63ec6447e9`
`font_01_sfnt_off000104a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104A8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011cba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CBA	16464 bytes
SHA-256: `4be8728cb682927f4150376078fc47477031ebb03d6da52273e3b8b2b9e1f393`

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