PDF malware analysis — malicious · 63e663878e50f612

MALICIOUS

PDF

85.7 KB Created: 2021-09-19 01:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 3a9890161a463ddd56efdd14d2207261 SHA-1: 58963f3e2d5472034a3d5bebd711808bb76579a4 SHA-256: 63e663878e50f612ac8377305429cac374b84dc79090856d4c7032a8cbf6830b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm on disposable hosting, with a deceptive download button lure. The document contains numerous external URIs, suggesting an attempt to redirect the user to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://smidgel.ru/uplcv?utm_term=super+mario+world+2+rom PDF link annotation
- https://fpcofmacon.com/nbloom/fckuploads/file/patesiwexajibiwopifa.pdfIn PDF document text
- http://www.boldino-hotel.com/ckfinder/userfiles/files/86216057436.pdfIn PDF document text
- http://mariautonoleggiomarsala.it/userfiles/files/74032556973.pdfIn PDF document text
- http://vencedor.coop/images/admin/file/64638855449.pdfIn PDF document text
- http://boldogelet.hu/media/54864257452.pdfIn PDF document text
- http://telesson.net/_UploadFile/Images/file/14962737943.pdfIn PDF document text
- https://prestinieurope.ch/userfiles/files/61253849276.pdfIn PDF document text
- https://tomorrowhubs.com/upload/users/files/lodekuwosuzamivu.pdfIn PDF document text
- http://harrodsrentacar.com/public_html/userfiles/file/xapim.pdfIn PDF document text
- https://francoisdaulte.com/ckfinder/userfiles/files/71595226345.pdfIn PDF document text
- http://cold.lt/userfiles/file/26670329064.pdfIn PDF document text
- http://www.evisiontiendaonline.com/ckfinder/userfiles/files/8236878822.pdfIn PDF document text
- http://studiotecnicodavico.eu/userfiles/files/47283850787.pdfIn PDF document text
- http://www.lasallelille.com/admin/ckfinder/userfiles/files/zifomuwolomekobekudew.pdfIn PDF document text
- http://teplorium.su/userfiles/file/59165237119.pdfIn PDF document text
- https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/jobevoxuburo.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3f96429d3---xaraxusogoxekitosil.pdfIn PDF document text
- https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/71908263308.pdfIn PDF document text
- http://clingac.es/d/files/jokoretojowagobugu.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613976ce1122c---42021335810.pdfIn PDF document text
- https://gulceoyunlar.com/calisma2/files/uploads/lawunofed.pdfIn PDF document text
- http://integrotech.eu/zdjecia/file/78017017228.pdfIn PDF document text
- http://dental-forum.ru/userfiles/file/vumabegoxidisikorijigi.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_off0000e7fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7FD	18168 bytes
SHA-256: `d080fda3f73374ffa672e8c968a160b58fd9a4bd0342fc18d8228388e4f145a9`
`font_01_sfnt_off00011778.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11778	10564 bytes
SHA-256: `82b45af83f3751ed856ccab3b60342e08ab2ae20fe9cb11ce026deadb57a9fa8`
`font_02_sfnt_off00012fa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FA2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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