PDF malware analysis — malicious · dd4d2d4b5ff6faba

MALICIOUS

PDF

95.1 KB Created: 2021-09-19 07:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 5e182d0037bcc78e2d504d9819db61c2 SHA-1: 076517761c2bedd888446d4a5643bafd65a80a1c SHA-256: dd4d2d4b5ff6fabaf5e6ef2e9edfde157913d54846c51ee31b87180f24d752dd

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of a link farm pointing to multiple distinct hosts, some of which are identified as compromised WordPress uploads, suggests an attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9918

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 http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7f71ef7a7---pagalozadidam.pdf In PDF document text
- http://lionsmarsala.it/userfiles/files/20856846634.pdfIn PDF document text
- https://lederstuhlshop.de/ckfinder/userfiles/files/85711614866.pdfIn PDF document text
- http://candybeauty.vn/upload/files/87190838050.pdfIn PDF document text
- https://mallorcaboom.com/res/wysiwyg/file/28974073346.pdfIn PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/511f24f0ce9c9910eed268325bcdb86c/xojanavesumuzeb.pdfIn PDF document text
- https://xn--fct8ml6mwue.tw/uploads/files/22771267511.pdfIn PDF document text
- http://centonze-vini.com/userfiles/files/12308689674.pdfIn PDF document text
- http://leeclinic.kr/userData/board/file/jisarob.pdfIn PDF document text
- http://sm300159.agchost.com/userfiles/files/40355412160.pdfIn PDF document text
- http://pazzo.jp/js/upload/files/xijebuteluredixobifeb.pdfIn PDF document text
- http://csim.jp/ckeditor/uploads/files/rigaxidavisajavapugufa.pdfIn PDF document text
- http://sakurahoaanhdao.com/webroot/img/files/57857366187.pdfIn PDF document text
- https://hsiaoying.com/userfiles/file/dunijuziki.pdfIn PDF document text
- http://villa-margherita.biz/userfiles/files/zikunoramiliz.pdfIn PDF document text
- http://hifitness.hu/userfiles/file/zilasarabepoxajavozexoji.pdfIn PDF document text
- https://mcdelandes.ca/uploads/file/surekidebumonexamuxa.pdfIn PDF document text
- http://tottazo.com/userfiles/file/55412705265.pdfIn PDF document text
- http://demkapi.com/resimler/files/ditebozalepesadej.pdfIn PDF document text
- http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kexuzadaj.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16138ffb27f8bc---81783472323.pdfIn PDF document text
- http://digitalpolicycouncil.com/imagenes/file/43676805620.pdfIn PDF document text
- https://xulynuocphangiathinh.vn/images/pic/file/88865023203.pdfIn PDF document text
- https://nstyapi.com/resimler/files/vabikesagewopeko.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=eggster+android+lollipopPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF133	19008 bytes
SHA-256: `903ff107026b96208afcf3c6ce540c3ff5e835a0fb911f00564b84c0625b066a`
`font_01_sfnt_off00012215.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12215	10548 bytes
SHA-256: `9db6dc375acb6d8901d20bd5f41e66a88cefb0878f5f21ccb8342b6af502577d`
`font_02_sfnt_off000139f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139F7	18256 bytes
SHA-256: `a353691a97c182d3ed1270f097d03d79ae2a1ce49a520ce6b58d16cf6e9026da`
`font_03_sfnt_off000156c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x156C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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