PDF malware analysis — malicious · 01bd73fe5f017a44

MALICIOUS

PDF

83.2 KB Created: 2021-09-15 03:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: fa22dd6fcae073aca93271b169052800 SHA-1: e0f829a28472a5b3d8821ca4fcfc253ceef3e382 SHA-256: 01bd73fe5f017a443149c8e3feaba312d4d9e8862fb10aca21dc662f982f6d6b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The document body is largely unreadable binary data, but the presence of embedded URLs and the heuristic findings strongly indicate a malicious intent to redirect users to external, untrusted sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

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.
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=today+tv+movies+list+tamil PDF link annotation
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136be7b8be88---movejuxav.pdfIn PDF document text
- http://sanchariglobal.com/userfiles/file/110448983.pdfIn PDF document text
- http://ajarnveerapong.com/UserFiles/file/loresuralozedabejom.pdfIn PDF document text
- https://majubesar.org/contents/files/92919876854.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/58444444815.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161411aabaf22d---7706993155.pdfIn PDF document text
- https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a04c2beb34---vimituwakojelibarijosebok.pdfIn PDF document text
- http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19058475355.pdfIn PDF document text
- https://zoomkish.com/basefile/zoomkishcom/files/tapuj.pdfIn PDF document text
- http://studiomuraca.eu/userfiles/files/25672064571.pdfIn PDF document text
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402c4e28dfc---834218890.pdfIn PDF document text
- https://artenika.pl/fck/file/25611397602.pdfIn PDF document text
- https://watertorens.nl/userfiles/file/sojafisovedevu.pdfIn PDF document text
- https://inmaabiladi.com/userfiles/files/6758694025.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5a5b12188a9955b2f598ba48c2ee134a/61176659494.pdfIn PDF document text
- https://stijsr.com/userfiles/file/furavizokenedugalo.pdfIn PDF document text
- http://dragonspond.com/uploads/files/kekegizupulegip.pdfIn PDF document text
- http://studio-castiglioni.com/userfiles/files/83887502655.pdfIn PDF document text
- http://15449010.com/FileData/ckfinder/files/20210903_C6AB6F78368530AA.pdfIn PDF document text
- https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/jadek.pdfIn PDF document text
- http://toyotacri.com/userfiles/files/kiwabewava.pdfIn PDF document text
- https://brothers-music.com/ckfinder/userfiles/files/nawetawirunumun.pdfIn PDF document text
- http://sgrappresentanze.eu/userfiles/files/memuna.pdfIn PDF document text
- http://cn-junsheng.com/upload/file///202193235171739.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16136a359a647d---28816140814.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_off0000e037.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE037	18208 bytes
SHA-256: `ebbe68c3128cf7ff03f25d03817759986f70888753b954c4258062234c9011f4`
`font_01_sfnt_off00010fc8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC8	10348 bytes
SHA-256: `7db7df290d879a5c7233422357f20bf89ca8e3969a40e818ecbfdc7b5899ed7d`
`font_02_sfnt_off00012732.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12732	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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