PDF malware analysis — malicious · dcec5236e7ca6200

MALICIOUS

PDF

70.1 KB Created: 2021-09-29 01:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 497e8e8873ee513a49d478c0eace72cf SHA-1: 49f5fcf16a51198913ccd738db12a1d63eba997b SHA-256: dcec5236e7ca6200800f9429993ff855dbb78a0d48a3595b4ff67943a43010db

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly indicated maliciousness. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports the malicious intent of distributing links.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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 http://ccsl.asia/files/xufenixerererurotunenow.pdf In PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147451f5f1a2---63343702406.pdfIn PDF document text
- https://oncallanatomist.com/ckfinder/userfiles/files/rijudo.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614b970ed3283---satafezutoguvepixu.pdfIn PDF document text
- http://shriadinathbank.com/uploads/lopofowozusu.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613997c521959---potukirilusipuvesib.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fb8df438f7d4c9b1f246490c76f1648b/64784301866.pdfIn PDF document text
- http://104450wp19.agentcentrum.com/userfiles/files/67542105390.pdfIn PDF document text
- https://bda.ch/ckfinder/userfiles/files/jewevebax.pdfIn PDF document text
- http://imoroz.by/upload/file/vigafopasuxogaluwojale.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0d109bd8f94ccc66a1d5831e560c29df/defali.pdfIn PDF document text
- https://mashtalkandil.com/userfiles/file/38379037405.pdfIn PDF document text
- https://www.pirkitpadangas.lt/ckfinder/userfiles/files/nasakenofalikepu.pdfIn PDF document text
- http://klgd.spokoino.ru/i/upload/files/zejodolukuri.pdfIn PDF document text
- https://www.temtechnologies.fr/ckfinder/userfiles/files/lagiso.pdfIn PDF document text
- https://senfina.top/uploads/files/67214587672.pdfIn PDF document text
- http://ptsound.com/plugins/ckfinder/userfiles/files/59357085708.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/bb28c4f8e4b9c7201ae80e5830e84681/legariwesotulur.pdfIn PDF document text
- http://vwtint.com/userData/board/file/45001215615.pdfIn PDF document text
- https://newfrio.com/userfiles/files/12674996390.pdfIn PDF document text
- http://cnokorea.com/userfiles/file/86066641530.pdfIn PDF document text
- https://laser123.com/geektic/files/bamavugepevixugenu.pdfIn PDF document text
- https://rocksoliddesigns.biz/userfiles/file/48439712250.pdfIn PDF document text
- https://sangolongphuong.vn/longphuong/news/files/ridinujogixaza.pdfIn PDF document text
- http://1hozain.ru/files/userfiles/files/59900175459.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gangstar+game+download+apkPDF link annotation
- 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_off0000b30e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB30E	10860 bytes
SHA-256: `bc9975821b4d4c30c50670f7c8a5ab784773918f3b5ec89c5caad057eafe72d3`
`font_01_sfnt_off0000cc0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC0C	15064 bytes
SHA-256: `6ebee602ef50c1b9765272acc4a16543881e7799fa7a8bd26784930db10b27cf`
`font_02_sfnt_off0000f25f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF25F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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