PDF malware analysis — malicious · 4a592541c33819da

MALICIOUS

PDF

75.9 KB Created: 2021-09-20 08:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 30800e679628fa1c708be7e6e7e6d5af SHA-1: 2478a7a491cee2f16f0fe90c78a5b535fdf253f6 SHA-256: 4a592541c33819da6618e5b6c31d53325d33d68126bcf6cddaa0a740454209f8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'drafthe.ru', suggesting it's used to redirect users to potentially harmful content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://drafthe.ru/uplcv?utm_term=angry+birds+seasons+download+android PDF link annotation
- https://www.delaneyllc.com/ckfinder/userfiles/files/bokilidojojevigunekeva.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd924aa2c---16528428640.pdfIn PDF document text
- http://insei.eu/userfiles/files/62025327594.pdfIn PDF document text
- https://jerseyshorepirates.com/userfiles/files/momikevujipiva.pdfIn PDF document text
- http://rasmesafar.net/basefile/basefiles/44871653190.pdfIn PDF document text
- http://www.multigacos.com/admin/uploaded/fck/file/11365667863.pdfIn PDF document text
- http://dichvutot99.com/webroot/img/files/tabupodenagididi.pdfIn PDF document text
- https://juraganmonyet.com/contents/files/sivuguduxit.pdfIn PDF document text
- http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/jelagemo.pdfIn PDF document text
- https://2-view.org/home/view/public_html/ckfinder/userfiles/files/salis.pdfIn PDF document text
- http://decom.pro/admin/ckfinder/userfiles/files/94201668333.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147c10290bbb---61158990549.pdfIn PDF document text
- https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/defawasametanaremejeno.pdfIn PDF document text
- https://on-call-anatomist.org/ckfinder/userfiles/files/boxasunitabokobuzumepipa.pdfIn PDF document text
- http://miyisz.com/mingyi/images/userfiles/file/94995185145.pdfIn PDF document text
- http://investgeorgia.ge/userfiles/file/tuwexividun.pdfIn PDF document text
- http://angelascanu.it/uploads/file/19481166570.pdfIn PDF document text
- https://www.sensiblemachines.com/ckfinder/core/connector/php/files/rabuwevonagimepas.pdfIn PDF document text
- https://drishtinetcom.in/FCKeditor/file/mitobeke.pdfIn PDF document text
- https://textosl.com/upload/editor/file/1167312385.pdfIn PDF document text
- https://bursac.net/userfiles/file/mijexanovemisatap.pdfIn PDF document text
- https://piphoto.tw/uploads/files/202109040702524250.pdfIn PDF document text
- http://www.videobezopasnost.ru/ckfinder/userfiles/files/871683224.pdfIn PDF document text
- http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76779181416.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_off0000c621.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC621	10648 bytes
SHA-256: `cb343c4b9426e910ab2fa7824322f74edbc005009fdf142a30f02a38964daf99`
`font_01_sfnt_off0000de73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE73	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f685.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF685	16696 bytes
SHA-256: `6264e68ae09cf7b154b5d9ab04296ca544cdae2ff5dba2e2483f22e31e159a64`

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