PDF malware analysis — malicious · 7839286818f6a503

MALICIOUS

PDF

81.9 KB Created: 2021-06-29 02:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 2c328646a984f0d5dead6fccc700776f SHA-1: 1ee5fe6a4ae0c0809daaba0bf6e3bb242e26861f SHA-256: 7839286818f6a5033619f1724542d0c1c56390c7b2ddb973f2e8a8ecfdadb596

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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
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://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/q659idqdq4agnns8fc2kvc5f82/8753458464.pdf In PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c96fdc10f---91571940419.pdfIn PDF document text
- http://big-blue-bus.com/pics/fotos/1/file/xumudazelamozusijeleladi.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfbf16b51---7734215387.pdfIn PDF document text
- https://hpsoft.shop/upload/files/xoviziwo.pdfIn PDF document text
- https://dietacud.eu/upload/file/nomuwevopafodiwemi.pdfIn PDF document text
- http://ukrainski-rosyjski.pl/userfiles/file/sutaxeruxi.pdfIn PDF document text
- https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/2289fb10b965b2c684756fe08b021807/9136155819.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/1d8cf61b7d148a30159491d26080f2f5/6169970721.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/7052d3fb8ee9a77ad69b22695df217b1/midixiwuli.pdfIn PDF document text
- http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770e1db262f---vajemopibatuzarakuforarer.pdfIn PDF document text
- https://bikidi.com/UpFiles/WebEditorFiles/file/zobufatotirobepofara.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/68228105300.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81384c5db1---37640923412.pdfIn PDF document text
- http://hoangle.vn/uploads/userfiles/file/26239283353.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608407ab87446---79010842635.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7ga8fpjbcvt113d2rf37ai207q/tejonalufapadi.pdfIn PDF document text
- https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/744e9ca217f08dcdaa07dc337ff58ab2/zapozubelow.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160898597db340---dexiwu.pdfIn PDF document text
- https://ewdel.cz/ckfinder/userfiles/files/ditolirisananupewi.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ac221214d8c---18021138985.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6c0aad36---bopekuwabofun.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/7djq30df84bj9mljf9c2uq7dj5/tovagiwazifoxoxuvubebiw.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+river+flows+pianoPDF 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_off0000dd1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD1A	10472 bytes
SHA-256: `24cf951e37962803c69ca246bf40c9f8ccdb72a1c69711e823ce8869fc91ab0b`
`font_01_sfnt_off0000f4e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4E7	17548 bytes
SHA-256: `2df34ca7c682e2d4fb3ab2ea58f4480ec22e9fbe0a5be9bbc165841118944a54`
`font_02_sfnt_off0001236c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1236C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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