PDF malware analysis — malicious · ee54f49fa13ab850

MALICIOUS

PDF

86.1 KB Created: 2021-06-30 05:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e37426ccd1274f85a95ae42b3a248aa2 SHA-1: 92c30a6c41209721dc2d386e06682f9377d2cef0 SHA-256: ee54f49fa13ab850b4096334f1e8ce362de336937fc3b6741880fff986efb2ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=concerto+for+the+left+hand PDF link annotation
- http://songhandiban.com/uploadfile/file/2021062308305773499.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a332f8b1b0---43505898369.pdfIn PDF document text
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/7289018817.pdfIn PDF document text
- https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c43b37360f4961a821fe9b6c00b65bd8/vexonasojik.pdfIn PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ig8k1aa46lhn815h8mtek10fsc/nesitasavazed.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/6eb7e9e1ec7be4178a65536a65cfda71/romakuw.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/dafifegasugem.pdfIn PDF document text
- https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4650438a4126df47c66e8e20d56871a4/61890587873.pdfIn PDF document text
- http://kxnjl.com/userfiles/files/kigizefuf.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e39ead33---vemowapizoviwazofesebobi.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c778356bfc---54783763523.pdfIn PDF document text
- http://eurogeographyjournal.eu/admin/fckfiles/file/92458463524.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ce127f168---26314111667.pdfIn PDF document text
- https://biocoils.com/img/file/napabirisozotefawibukir.pdfIn PDF document text
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6e13fbc88cd930b9176a258e6a73f3a8/namizixoxav.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/xujol.pdfIn PDF document text
- https://adepotcustom.com/UploadFiles/file/20210429140928134.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a623a7f087c---55414966493.pdfIn PDF document text
- http://simonide.org/userfiles/file/9842930717.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ob5jmrgjg5egrnv77du54v0m56/74403671097.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882a0dcd2d---jogebopanisuzad.pdfIn PDF document text
- http://bukhatirhomes.com/userfiles/file/65762254975.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf6fc59e3e---5799082240.pdfIn PDF document text
- http://cedule-plachty.cz/files/file/radebovirifer.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_off0000eccb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECCB	17588 bytes
SHA-256: `95d6b95b8e86ba294289b20a16a831ad302ee5a8ee05c67fd8efc9db96d14204`
`font_01_sfnt_off00011a15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A15	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001322c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1322C	10344 bytes
SHA-256: `85c1ecd958266c14a225958793ad38ec02caedd3e06021eef19f77c663598195`

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