PDF malware analysis — malicious · 94d614ee9c10b525

MALICIOUS

PDF

81.2 KB Created: 2021-09-20 05:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 33021e46863c06945b37f47f3a1285be SHA-1: ee35a705375782587c3f8a3a07699e11a2a6b342 SHA-256: 94d614ee9c10b525e5cf4f232f4fde36c133368f1ba868a59204b2bf8a47ed07

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://crysiq.ru/uplcv?utm_term=qr+code+de+beyblade+burst+rise PDF link annotation
- https://www.agencesramos.com/ckfinder/userfiles/files/sabex.pdfIn PDF document text
- http://transporteslaplata.com/imagenes_web/file/66779098693.pdfIn PDF document text
- https://inunekocp.jp/mailmagazine/upload/files/jekixafefikesiponoliniv.pdfIn PDF document text
- http://termosystem.pl/userfiles/file/rivutamosasulopilan.pdfIn PDF document text
- https://anyimaker.com/upload/users/files/53138525772.pdfIn PDF document text
- http://motolargo.pl/userfiles/file/savezuwuropejaxen.pdfIn PDF document text
- http://geomanteia.com/userfiles/files/27192326950.pdfIn PDF document text
- https://vanrun-it.nl/userfiles/files/buzenumixi.pdfIn PDF document text
- http://aptekadc.pl/userfiles/userfile/bulipuzufazemeguvale.pdfIn PDF document text
- http://cycling-software.com/files/file/41836867814.pdfIn PDF document text
- http://cisseo.net/userfiles/files/51460756630.pdfIn PDF document text
- https://webrobogo.hu/kepek/nipuwezujugobad.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/gimufelumef.pdfIn PDF document text
- https://yar-net.ru/userfiles/file/60853719346.pdfIn PDF document text
- http://matsusushionline.com/uploads/files/30265219969.pdfIn PDF document text
- http://gillsandgeckos.com/userfiles/file/katanaluduxosonokipiga.pdfIn PDF document text
- http://rnralpha.cz/res/file/14984904348.pdfIn PDF document text
- https://discovercefalu.it/_data/images/file/kanedefedore.pdfIn PDF document text
- http://avvocato-callegaro.it/public/file/69779340947.pdfIn PDF document text
- http://sirindhorn.net/upload/File/64582217391.pdfIn PDF document text
- http://hoachattn.com/image/files/80860311956.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16145a1a9ba91b---42892883229.pdfIn PDF document text
- http://www.tsahimmongol.com/uploads/images/files/fajoninifob.pdfIn PDF document text
- http://koryosushi.com/uploads/files/33966597121.pdfIn PDF document text
- http://lynxitservices.com/ckfinder/userfiles/files/korarojajoxi.pdfIn PDF document text
- https://bibonatura.hu/ckfinder/userfiles/files/21837576459.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_off0000d97d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD97D	10672 bytes
SHA-256: `41bbb88593f48b5cfe0270a3709553de9e74c1009095a0ac8d56d85d115541cd`
`font_01_sfnt_off0000f225.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF225	17112 bytes
SHA-256: `90fece5e6a251573c5cbabf736906ef8fb8badc9ee7dde9b7cfd76d51c33c041`
`font_02_sfnt_off00011ea1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EA1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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