PDF malware analysis — malicious · b0904d95a69bc44d

MALICIOUS

PDF

73.8 KB Created: 2021-07-24 08:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: d6e0a876d812a43a082c04230bce77dc SHA-1: 6dacee73b99d9a7217239e8e71f3a28d8a077d21 SHA-256: b0904d95a69bc44dc539d859b36cf35caaea16f1f0bd870ea1d02d8fd940a2ec

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/85aa18d744bc848612e95ff9701a6f60/1768988936.pdf In PDF document text
- https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/q32tfkr9iel0dn5gq09koso5es/59133089128.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/ed10e6b0c145963f4c69fdca0663f47f/56372630683.pdfIn PDF document text
- http://hasyo.net/files/file/kisaseku.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608038107e690---90000185691.pdfIn PDF document text
- https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/50c675b1a866437a177bef6b8b9ec664/50899227286.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078761987539---nazivurowepakafodoxotux.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/6a2e086f61205e7d0889afde749d03ab/fazep.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8ea23f7da---migipusiwexuruzagofol.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/18f8bfc63cc012c62d700812f225e515/30206781140.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdf0e588bb---71082383658.pdfIn PDF document text
- http://haenuri.net/ckupload/files/movumozibivutoxawotezu.pdfIn PDF document text
- https://tipresentoio.it/images/file/38471431031.pdfIn PDF document text
- http://suncreekpuppies.com/clients/8/88/88daaab1104cc9784d9cd8b59d189b35/File/xemigudidoxipobanomafe.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/a3e77106b007ce4fa2df27af3032d6f2/60292719116.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b897b1030---31637451358.pdfIn PDF document text
- http://idroter.org/userfiles/files/5752494324.pdfIn PDF document text
- http://tantos.jp/js/upload/files/laxowi.pdfIn PDF document text
- http://escuelasfutbol8.com/docs/files/69098409611.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c71add1aa8---2393101086.pdfIn PDF document text
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/b21489dcdb0912abb90d1549672c4d28/dawigosaritopezevimiluv.pdfIn PDF document text
- https://dolaodong.com/userfiles/file/46085651592.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/vigetafafa.pdfIn PDF document text
- http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/wipaxuxivuw.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=2016+polaris+rzr+1000+s+service+manualPDF 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_off0000be53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE53	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d66a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD66A	11028 bytes
SHA-256: `383f245055bb8fa53cb5aea773956581250dd494f92f5311410fe80c012a4b78`
`font_02_sfnt_off0000f025.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF025	15832 bytes
SHA-256: `34401094c56e42d15031ca05293b256e3f3223a60827781a7952ce4f40919a9a`

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