PDF malware analysis — malicious · e90e9175c7330cb0

MALICIOUS

PDF

79.9 KB Created: 2021-09-22 22:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1805bbcdc953319ae4943c85db817c48 SHA-1: 6ba9253a4b5a50055c06723b43856c76c2b7d1d8 SHA-256: e90e9175c7330cb094e6f5e780fd8695002ac9450b2b6dc5924c1fcbf4cd7482

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable hosting, indicative of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to host numerous small, unrelated PDF files for SEO manipulation or to obscure malicious links. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

Heuristics 7

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
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://garglob.ru/uplcv?utm_term=download+harvest+moon+android+free PDF link annotation
- http://mascotdd.com/file_media/file_image/file/tiziluloluka.pdfIn PDF document text
- https://serwisnawigacji.pl/userfiles/file/tubemaremononinarebi.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161375bb6a7b82---88063943099.pdfIn PDF document text
- https://bustotoronto.com/userfiles/file/84108908711.pdfIn PDF document text
- https://yaslibakicisi.net/userfiles/file/52702327022.pdfIn PDF document text
- https://bawaniint.com/ckfinder/userfiles/files/29845947388.pdfIn PDF document text
- http://yishiweb.com/upfiles/files/20210916_144303.pdfIn PDF document text
- http://www.deopendeur.org/imgUser/file/12463116453.pdfIn PDF document text
- https://nhaccugiare24h.com/uploads/userfiles/file/92962364993.pdfIn PDF document text
- http://geose.ru/userfiles/file/38439723073.pdfIn PDF document text
- https://caror.hu/ckfinder/userfiles/files/81150567157.pdfIn PDF document text
- http://hwangtosidae.com/userData/ebizro_board/file/26559941284.pdfIn PDF document text
- http://joyandwowbook.com/upload/file/4014432685.pdfIn PDF document text
- http://miyozenemeryville.com/uploads/files/45522477000.pdfIn PDF document text
- https://cdmsig2.com/ckfinder/userfiles/files/lobulipamefipip.pdfIn PDF document text
- https://posetili.ru/userfiles/file/6170094336.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3ff2640dd---roxamixet.pdfIn PDF document text
- http://jysfh.com/upload_fck/file/2021-9-11/20210911030639225508.pdfIn PDF document text
- https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/bumivirefu.pdfIn PDF document text
- https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/godisi.pdfIn PDF document text
- https://divetechmarine.com/contents/files/xozibakusepoturiwurap.pdfIn PDF document text
- https://kaparatt.com/images/File/89029254513.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_off0000cc56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC56	20180 bytes
SHA-256: `c9d27d7db3ba410554147e7f6a6a4bdaab4c512ce0f92ab595ebf7841f89fb15`
`font_01_sfnt_off0001017c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1017C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011993.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11993	10772 bytes
SHA-256: `b53981e0e5019379acd9cbf08be838ab4796931898632d5670c9bbffc2091e06`

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