PDF malware analysis — malicious · f7575946a9458911

MALICIOUS

PDF

85.7 KB Created: 2021-10-16 08:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 0cba9b6ba1813cc8bc456356c6efb833 SHA-1: 3afbe5ee8a2a978ae816a9072d419c8f65ecd97d SHA-256: f7575946a94589117e81c733cf7450f3c691d6e8c1e5381bea1cd1c0abd5b9e0

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs pointing to potentially malicious domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a deliberate effort to create a link farm on disposable hosting, likely to obscure malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://smidgel.ru/uplcv?utm_term=how+to+add+comments+in+preview+mac PDF link annotation
- https://sofupingame.com/calisma2/files/uploads/gilupavejelupene.pdfIn PDF document text
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615075a073b7b---24561822760.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/meovegedgmnrsssv0i95pgkvn6/wavokagerimututubepi.pdfIn PDF document text
- http://thamdinhgiadaiquang.com/img/files/61089429379.pdfIn PDF document text
- http://goldmustang.com/files/files/92180314259.pdfIn PDF document text
- http://smolninskayahotel.com/userfiles/file/29534851085.pdfIn PDF document text
- https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/514999703.pdfIn PDF document text
- https://tonerihned.cz/userfiles/file/lakenokawijutajevaluferup.pdfIn PDF document text
- http://progetec.org/userfiles/files/rapezadizivefijorusape.pdfIn PDF document text
- http://gtlitalia.com/userfiles/files/41553472841.pdfIn PDF document text
- https://fajndoktor.cz/images/file/files/15294258530.pdfIn PDF document text
- https://giridhareye.org/ckfinder/userfiles/files/64955211087.pdfIn PDF document text
- http://locnuocvietmy.com/Images_upload/files/73506398369.pdfIn PDF document text
- https://rugsdirect4u.com/uploadedfiles/file/jigegatime.pdfIn PDF document text
- http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wupafivakibabupibusu.pdfIn PDF document text
- http://marklaliberte.com/fckupload/file/xiwugafopukapuwo.pdfIn PDF document text
- http://mjacz.cz/soubory/files/89118987487.pdfIn PDF document text
- http://dentish.ru/ckfinder/userfiles/files/posafosanapawarawopega.pdfIn PDF document text
- http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37766481468.pdfIn PDF document text
- http://vhktn.at/images/content/files/sugowulalumudufizogabefib.pdfIn PDF document text
- https://pellevah.com/upload/files/83088444683.pdfIn PDF document text
- http://kencert.vn/uploads/image/files/46589783294.pdfIn PDF document text
- https://yantrasearch.com/ckfinder/userfiles/files/60589957187.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_off0000ea9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA9B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000102ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102AD	17620 bytes
SHA-256: `e3f44149734172e4407426819c2a66340cea722ba3b8fe88efcaf9be503e2363`
`font_02_sfnt_off00013070.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13070	10772 bytes
SHA-256: `870421fecca5eef1bb386b1bee8056ebb77fc8bf4568fabc90ce04bffc4e6561`

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