PDF malware analysis — malicious · d460474746c8a96e

MALICIOUS

PDF

89.3 KB Created: 2021-09-01 17:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 2357461fcf4e4f9e5c01f43132dcac02 SHA-1: f3f160f439abc112de63a219ab425c3e12108efa SHA-256: d460474746c8a96e89fb348bab30fcd9ff795c1132f4b79c61f50eb73976b823

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest this PDF is used as a lure for phishing or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://coretry.ru/uplcv?utm_term=android+game+hack+tool+apk PDF link annotation
- http://antichigelsi.it/userfiles/files/zanozotugaripomitaru.pdfIn PDF document text
- http://studiogiovannone.com/userfiles/files/muzofupumaligetiloweva.pdfIn PDF document text
- http://shreyaghoshal.com/konadnew/userfiles/file/5465546374.pdfIn PDF document text
- https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/97ho85kldfvsnqp7hm2a2u072a/dokidizeriziju.pdfIn PDF document text
- http://rigdrilling.org/userfiles/file/95678295592.pdfIn PDF document text
- http://tortsurprise.ru/upload/redactor/files/64348633298.pdfIn PDF document text
- https://cortopolis.ar/userfiles/file/74646503646.pdfIn PDF document text
- http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/49532487015.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609647d71cc9e---79858999312.pdfIn PDF document text
- http://dongphat.net/upload/files/10216296607.pdfIn PDF document text
- http://findmecakes.com/userfiles/files/rowimurumedaxezati.pdfIn PDF document text
- https://jxloanchien.com/style/postimage/file/19085667948.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddbd0a1205---gebuvurig.pdfIn PDF document text
- http://lossfundraisingevent.com/clients/f/f5/f5ed5e364f2f51aa46a4c5982fab9a07/File/kasefevaza.pdfIn PDF document text
- http://wanyuantemple.tw/userfiles/file/91169168359.pdfIn PDF document text
- https://ap-qatar.com/userfiles/files/6561041123.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/pf08qua7re2df1ii45ujuc5336/3989765154.pdfIn PDF document text
- http://hungthanhauto.com/luutru/files/10392068058.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/12640222027.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160930c4535df0---54762783161.pdfIn PDF document text
- http://security-m.jp/tool/images/file/karagamopojuwevi.pdfIn PDF document text
- https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/79167747758.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6eddb0225---pejojepaxalo.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078d606aa4eb---55000334438.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_off0000f8ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8AC	17940 bytes
SHA-256: `3f2264c79edeee66874d92a41c2b8bd77bf6471ad8c833c66ff2e5dd4d1b13df`
`font_01_sfnt_off000126bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126BF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013ed6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13ED6	10868 bytes
SHA-256: `5da302f2377bf3264047938933c9d1c08369ca9e75423d7a0b9aecd5fb86c291`

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