PDF malware analysis — malicious · d93a23ab0eb0fdda

MALICIOUS

PDF

82.5 KB Created: 2021-08-22 01:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 357f92e975a675ea6ba688385963cced SHA-1: 1400277ade5f02b187c7e87e0b2a8a97caa867a4 SHA-256: d93a23ab0eb0fdda390f0df2c2f61c7704470a41151da719a052257fb871a851

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of 'utm_term' parameters in some URLs indicates a potential SEO-based lure to attract victims. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's used to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://garglob.ru/uplcv?utm_term=gemstones+of+the+world+walter+schumann+pdf PDF link annotation
- http://salocchi.it/userfiles/files/6475412103.pdfIn PDF document text
- http://debandhelder.nl/ckfinder/userfiles/files/46926518840.pdfIn PDF document text
- https://west-holding.com/userfiles/file/poziwevijidujixonafobep.pdfIn PDF document text
- http://toanlinh.vn/upload/files/30904365737.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/92fda272b574991ea838ee4b77b4ba79/bedagomorenodofe.pdfIn PDF document text
- http://limoride.net/gallery/file/fifivepedufuweg.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074303331bb8---10161629693.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/26cdc97fbd4390a5ca6e38d24a4d9eb3/tazidanesiv.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/16857263391.pdfIn PDF document text
- http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/xubal.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/336kjo8rokj4fr41o4mb7p1nv1/dikenorenulivotulogaj.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e565470cd---zuraverubusaviloxusunet.pdfIn PDF document text
- https://secolink.sk/userfiles/file/23745733456.pdfIn PDF document text
- http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nitejogo.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/daa73f2b2fbe7625e4f4f232053a73d3/jabejagajexazerinigomisax.pdfIn PDF document text
- http://maslatalaia.com/userfiles/file/38315387321.pdfIn PDF document text
- http://tlumacz-lipno.pl/pdrzewiecki/files/43475054820.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9270ea7ed---91969963981.pdfIn PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a490fe2eed---18288652483.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbb6539446---95724282820.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e0977bfe374fd506f4af64588d90edef/58955228578.pdfIn PDF document text
- https://aradmissions.com/ci/userfiles/files/4965259945.pdfIn PDF document text
- http://jtylek.pl/Upload/file/guturajafasobavo.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/9700a9df5ac9f4c15b55c131cbaa9f2d/1403342354.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/e2cmomj7qhpu460ovup845an51/rasixopogojavidirava.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_off0000db88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB88	17152 bytes
SHA-256: `0c859719281af9adf3adc345797eb6d90317ef40619e6989214af54e3bf42083`
`font_01_sfnt_off0001080e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1080E	11016 bytes
SHA-256: `69717ccf37c5cd713a29a72b15dbd726eb7f2e9fcee6c8eef3e366c28df78f6b`
`font_02_sfnt_off0001219b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1219B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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