PDF malware analysis — malicious · c782c702b0958e17

MALICIOUS

PDF

79.0 KB Created: 2021-09-17 11:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 0f969d7a1b4a55b404f6781c263a2e0c SHA-1: f9eac8929f301ad0af652e9686b9aa792a41fe15 SHA-256: c782c702b0958e17033af613131f86646e8596469c8e48734600765cdf7291d3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and multiple external URIs, indicating malicious intent. Several heuristics point to the file acting as a link farm, with some links pointing to compromised WordPress upload storage. The embedded JavaScript likely facilitates the redirection to these external sites, which could host phishing content or further malware. The ClamAV detection further supports its malicious classification.

Machine Learning

Nyx PDF Classifier suspicious score 0.3290

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 http://cuathepvangohaiduong.com/images/ckeditor/files/xowigutit.pdf In PDF document text
- http://autoklej.pl/app/webroot/media/files/93185024820.pdfIn PDF document text
- http://dental-forum.ru/userfiles/file/6803045253.pdfIn PDF document text
- https://sluganarodu.org/userfiles/files/88414532501.pdfIn PDF document text
- http://ventensis.lt/public/ckfinder/userfiles/files/zirumipuzuwo.pdfIn PDF document text
- https://asmitahrgroup.com/ckfinder/userfiles/files/74009806847.pdfIn PDF document text
- http://chukgoobok.com/files/fckeditor/file/3860144075.pdfIn PDF document text
- https://memo-log.com/userfiles/file/jerizamupuwumeletedivudom.pdfIn PDF document text
- http://musclecar-taps.com/js/upload/files/61866341447.pdfIn PDF document text
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c62b50d01e---93691370458.pdfIn PDF document text
- https://www.opsclown.it/ckfinder/userfiles/files/rubimuxeduzumize.pdfIn PDF document text
- http://grimastone.ru/files/99462063349.pdfIn PDF document text
- https://gegeny.hu/uploads/file/84520765416.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161327be8e7d04---7452751761.pdfIn PDF document text
- https://renebeumer.nl/userfiles/file/31754567582.pdfIn PDF document text
- http://gardensyellowcab.com/admin/images/file/15535510076.pdfIn PDF document text
- http://blow-w124.com/js/upload/files/wusuwibepusev.pdfIn PDF document text
- http://adas-muko.pl/photo/file/rejasoxajedonutito.pdfIn PDF document text
- http://teresachild.com/upload/files/digajusul.pdfIn PDF document text
- http://behtarinekhodetbash.com/files/files/puwoxaw.pdfIn PDF document text
- http://firmen-bekleidung.at/userfiles/file/15624844123.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/306574ebf301e986168dc5b2c91f6315/muzufumewuvoduwovitiw.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+tower+defense+4+hackedPDF link annotation
- 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_off0000d4d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4D8	10860 bytes
SHA-256: `6b53922a3d50c1c327e9385d4db8b2783d9eb42db3e86d6db8fb0ea2c25c2625`
`font_01_sfnt_off0000edeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDEB	19412 bytes
SHA-256: `ee00d8c87edb567f0f4797b57005c762dadfda120fd5564616c89c640fa7f9e0`
`font_02_sfnt_off00012129.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12129	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.