PDF malware analysis — malicious · 020f914e73e1cf3a

MALICIOUS

PDF

69.1 KB Created: 2021-09-27 02:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 6c70c1b60150040a7fcb32f656a5f098 SHA-1: 324670a3ee9f5b680fe5689d6883a14d6044f27f SHA-256: 020f914e73e1cf3a8e75703621c5cee19cc8862011f58b6352726dc1850be33b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that point to link farms, with one specific URL suggesting a lure for 'among us free download'. This pattern is consistent with phishing or social engineering attacks designed to trick users into downloading further malware. No scripts were extracted, but the presence of multiple external URIs and the link farm heuristic strongly suggest a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=among+us+free+download+pc+2020 PDF link annotation
- http://abwingstop.com/uploads/files/55617950983.pdfIn PDF document text
- http://rainternacional.com/userfiles/file/55384569886.pdfIn PDF document text
- https://jin-hung.com/userfiles/file/54370456218.pdfIn PDF document text
- https://miraclechuppahs.com/userfiles/file/63739969848.pdfIn PDF document text
- http://3e3i.com/UserFiles/file///74797532971.pdfIn PDF document text
- https://people11people.com/uploads/File/zopovikinanidutewovi.pdfIn PDF document text
- http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/33478494559.pdfIn PDF document text
- https://mongolia-volkslift.com/uploads/files/jimenawam.pdfIn PDF document text
- http://agilesolutions.in/uploads/29534661842.pdfIn PDF document text
- https://artlabjo.com/userfiles/file/zebajigafirebabolironanus.pdfIn PDF document text
- http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/90315623461.pdfIn PDF document text
- http://c2r.su/uploadfiles/file/2021090707152673499.pdfIn PDF document text
- https://szpital-sulecin.pl/images/fckfiles/file/18012505155.pdfIn PDF document text
- https://millinerandassoc.com/files/file/garita.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef40f60ab6---10603244274.pdfIn PDF document text
- https://sunarchegypt.com/userfiles/file/68527917097.pdfIn PDF document text
- http://clinivetmadonnadirosa.eu/userfiles/files/19248594765.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e938f36599---36976638767.pdfIn PDF document text
- http://coimbrasoftware.hu/images/uploads/files/jokegubekul.pdfIn PDF document text
- http://gestioniarmatoriali.it/30879779063.pdfIn PDF document text
- http://nutranghongngoc.com/media/ftp/file/nutixudamofofu.pdfIn PDF document text
- http://global-leasing-management.com/uf/file/86473704502.pdfIn PDF document text
- http://www.startbatteries.gr/ckeditor/ckfinder/userfiles/files/tarojajenivuxoluwapiz.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_off0000ade4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADE4	11184 bytes
SHA-256: `b84207a3af16b647b55d9370b0bbb8880647748f54ca7815e515407549d9c41b`
`font_01_sfnt_off0000c7fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7FB	15404 bytes
SHA-256: `1175742551158e26befbe65765abe977baa3f04baed798bd5af02152a4809f76`
`font_02_sfnt_off0000ef3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF3F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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