PDF malware analysis — malicious · f646e4dc576c4540

MALICIOUS

PDF

94.5 KB Created: 2021-09-23 19:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: d02578e85d6e36d7327ca7a6645dbbf2 SHA-1: 62a68145ddee5fbee39666732c9f8cf2a75fb08d SHA-256: f646e4dc576c45403aab68d9e0fce4c18dcd9fc446392859ffa2f7ee3f98cc66

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of external links, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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
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://www.evisiontiendaonline.com/ckfinder/userfiles/files/kulufasogafevapusutadipix.pdf In PDF document text
- https://sweetburden.com/upload/users/files/96723000849.pdfIn PDF document text
- https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e445bf618---kafozevekewasudenubugiw.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303f5eb1d40---dijubilufaxube.pdfIn PDF document text
- https://tolgyesvolgy.hu/userfiles/file/fodipazuvejorodofeko.pdfIn PDF document text
- http://cissi.it/userfiles/files/sumubipidan.pdfIn PDF document text
- http://ekorepetycje.eu/Upload/file/pulinodonexajidatufoxaz.pdfIn PDF document text
- http://kaizousha.com/js/upload/files/75454668674.pdfIn PDF document text
- http://arci-mp.fr/admin/File/kesodagakelokipagib.pdfIn PDF document text
- https://phuketwebstudio.com/ckfinder/userfiles/files/geroxofebizegixorip.pdfIn PDF document text
- https://inunekocp.jp/mailmagazine/upload/files/pezizunudupomuromineka.pdfIn PDF document text
- http://hilimall.ae/uploads/files/16564702264.pdfIn PDF document text
- http://gorsilawfirm.com/userfiles/file/pajij.pdfIn PDF document text
- https://sportuna.be/ckfinder/userfiles/files/kenabotuvunupaxejuvawepi.pdfIn PDF document text
- http://1hozain.ru/files/userfiles/files/50974982011.pdfIn PDF document text
- https://www.tyrtaios.gr/ckfinder/userfiles/files/dawunarejo.pdfIn PDF document text
- http://dienlanhtruongson.com/upload/files/13197038375.pdfIn PDF document text
- https://rumahbaruku.com/contents/files/9342277084.pdfIn PDF document text
- http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/negirojotutiruka.pdfIn PDF document text
- http://zvaracskaskola.eu/editor_uploads/system/files/pukakovijipuzipekanu.pdfIn PDF document text
- https://istocdukkan.com/userfiles/files/59005616483.pdfIn PDF document text
- http://wskinbody.com/data/boardData/files/21164983232.pdfIn PDF document text
- http://mtjjt.com/2013/upload/article/files/210913151929891153ebhan.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=organigrama+de+sabritas+pdfPDF 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_off00010c35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C35	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001244c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1244C	10840 bytes
SHA-256: `8446e0db6fff9073f0b65721ffbeee8398b4f640a3432872deb8e86e0c500ed9`
`font_02_sfnt_off00013ce9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13CE9	18624 bytes
SHA-256: `f5fc4b6820045c22bc3ba5886ca61ec47c39a722b96c2d40c3a32ee63677c1dd`

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