PDF malware analysis — malicious · f565492d40835e82

MALICIOUS

PDF

75.2 KB Created: 2021-09-21 20:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 9bc27c952404498fd694ec3a89276864 SHA-1: c8c09e8c442eadbd2ac2a5eb52444017e1e1b9b0 SHA-256: f565492d40835e82360cac1163811613fbff06003e1980e899ab92d91a0d5875

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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
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.
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://inwebjor.ru/uplcv?utm_term=redeem+primogems+genshin+impact PDF link annotation
- http://bantinnhadat.com/users/files/xunenutujofumevet.pdfIn PDF document text
- http://www.enfersalus.com/ckfinder/userfiles/files/6962191601.pdfIn PDF document text
- http://britishcytology.org.uk/ckfinder/userfiles/files/fimelufijunu.pdfIn PDF document text
- https://alebusph.centralcms.cloud/galeria/files/gutiminazudexaxubu.pdfIn PDF document text
- http://nakamurasangyou.jp/app/webroot/uploads/files/dozurunovowibolaboral.pdfIn PDF document text
- http://jpsacademy.com/slbdavbatala/userfiles/file/zarigiwanipazesi.pdfIn PDF document text
- https://fertilizerproductionprocess.com/d/files/83750696326.pdfIn PDF document text
- http://oodow.cn/upload/file/210906185418735820o0g742pkje3y.pdfIn PDF document text
- https://www.highlandernepal.com/assets/ckfinder/userfiles/files/73886135566.pdfIn PDF document text
- http://seoulsquare.com/userfiles/file/vujaluvisubemute.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425379a3733---49254740239.pdfIn PDF document text
- https://www.gurgy.net/ckfinder/userfiles/files/wakemomofadamu.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d773984c7---91015652176.pdfIn PDF document text
- https://uangraja.com/contents/files/xupob.pdfIn PDF document text
- http://nbc.com.vn/ckfinder/userfiles/files/25981326854.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b71aaa5916---66749615047.pdfIn PDF document text
- http://pk.mo/userfiles/file/3846329016.pdfIn PDF document text
- https://proektasis.gr/admin/spaw2/uploads/files/29115753898.pdfIn PDF document text
- http://alsace.annuaire-regional.com/ckfinder/userfiles/files/28673531686.pdfIn PDF document text
- https://betamachinery.sa/other_files/File/91100937382.pdfIn PDF document text
- https://tomorrowhubs.com/upload/users/files/79302297265.pdfIn PDF document text
- http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/losokanaludul.pdfIn PDF document text
- http://hwayinn.com/image/files/20210902_145534.pdfIn PDF document text
- http://rivucota.com/upload/files/zexisatep.pdfIn PDF document text
- http://esoftland.com/userfiles/file/46013885529.pdfIn PDF document text
- http://gimhaejazz.com/fckeditor/userfiles/image/dekigesusa.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_off0000c0b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0B8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d8cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8CF	10960 bytes
SHA-256: `740d272d32aceb3f579cf0f444a2e9f2b0ab690546aacf25b8a5879887663744`
`font_02_sfnt_off0000f1cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1CB	17740 bytes
SHA-256: `47b77b5a79b87e9492f2eb3d0b011a906a8f83cdb0910c2f154eeb8be233032e`

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