PDF malware analysis — malicious · 1a8468f262697c17

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 05:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6bbf7f28a08dc98fc9a2ba8350f9bd4e SHA-1: 2e6b2ccc68edc8b7bf2f4c19da91a5406294b7dd SHA-256: 1a8468f262697c17e9dd39829be17bc01f7b49c4e195b4285204e3cd56bd415e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure to a phishing or malware distribution site. The embedded JavaScript is likely responsible for initiating the redirection or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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.
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://madame-tina.com/ckfinder/userfiles/files/21685060361.pdf In PDF document text
- https://zohopinler.com/calisma2/files/uploads/71911316323.pdfIn PDF document text
- http://www.fishandcosolicitors.com/uploads/files/bamigogojegagazipile.pdfIn PDF document text
- http://mcenterdk.ru/fck_editor_files/files/30074936928.pdfIn PDF document text
- http://vistobrasil.net/uploads/file/16083719906.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613216003996a---nokin.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/53d7d455af09e143fd92577e0295f90c/51604747458.pdfIn PDF document text
- https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/26457322338.pdfIn PDF document text
- https://johanbjerke.se/userfiles/file/30522955529.pdfIn PDF document text
- http://erh-hu.com/userfiles/file/pilagot.pdfIn PDF document text
- http://conelser.hu/fck_uploads/file/17175782154.pdfIn PDF document text
- https://encoyun.com/calisma2/files/uploads/futitojiziv.pdfIn PDF document text
- http://geotersrl.it/file/31149508259.pdfIn PDF document text
- http://silverk.ru/img/lib/file/letesad.pdfIn PDF document text
- http://szentimresiklos.hu/upload/file/50571236324.pdfIn PDF document text
- https://dpt-mh.com/uploads/news/files/dowonabejuxexoribenap.pdfIn PDF document text
- https://ikansambel.com/contents/files/xevejezagitop.pdfIn PDF document text
- https://valve-toho.com/userfiles/file/xikedomelofilasiteja.pdfIn PDF document text
- http://lapenya.cat/imgjovesnaves/file/wefavasavofekipakopi.pdfIn PDF document text
- http://coytex.net/ckfinder/userfiles/files/75483684436.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161347410707ff---tofewewokupadi.pdfIn PDF document text
- https://777mto.org/contents/files/76409162517.pdfIn PDF document text
- http://sukhonthip.com/file_media/file_image/file/61304520385.pdfIn PDF document text
- http://lnianemarzenie.pl/userfiles/file/8655230029.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=64+bit+support+parallel+spacePDF link annotation
- 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_off0000dee8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEE8	20572 bytes
SHA-256: `c78f60159dd367203899680b54d48fc32f5240e6f6091b0522d241d3086983e8`
`font_01_sfnt_off0001153f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1153F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012d56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D56	10652 bytes
SHA-256: `3e7f3bef73a3e5b41c792a685c959cda8c205778cae15d1d22c3d7cf464b7895`

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