PDF malware analysis — malicious · 480003bbfd99c415

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 03:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 443e91b41189523544742ce5975a3bfb SHA-1: 59bd2ae8620e23b1bcbc9919f00dc4ad6e7edf7c SHA-256: 480003bbfd99c415aab3251e6e89f0d6e9ca28f75f9d3a61b8d0941175b3f5b0

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to unknown or potentially malicious domains, suggesting an attempt to redirect users to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the PDF is designed to host a collection of links for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://pnlcoach.com/misc2/file/ In PDF document text
- http://giovanniseneca.eu/userfiles/files/78272196161.pdfIn PDF document text
- http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/pivof.pdfIn PDF document text
- http://se-ty.ru/uploads/userfiles/file/nitejezaxifabuzatuti.pdfIn PDF document text
- http://strahyi.ru/images/file/kimuzasek.pdfIn PDF document text
- http://mylodge-naoshima.com/images/blog/file/jadarogu.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161393428e8785---lumevetuketokufezu.pdfIn PDF document text
- http://sh-songshi.com/admin/upimg/file///48455126209.pdfIn PDF document text
- http://beiwendq.com/userfiles/file/zoxujobaxevoxasuvigu.pdfIn PDF document text
- http://adec-interiors.net/Uploads/file/77908778967.pdfIn PDF document text
- http://ekorob.pl/userfiles/file/2255222331.pdfIn PDF document text
- https://sergiomauri.com/images/file/89921906545.pdfIn PDF document text
- http://termocity.by/pics/files/79408884903.pdfIn PDF document text
- http://www.prieteniitehnicii.ro/documente/file/bowunojenuru.pdfIn PDF document text
- http://extintoresorigen.com/images/editor/ridivezonepova.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/rj1vvsmpdrtbo7ej0ugu0i6pkv/gudojadodizirerirozof.pdfIn PDF document text
- https://fainitelecommunication.com/public/editorfiles/file/59080866419.pdfIn PDF document text
- http://biolabsrl.org/userfiles/files/lepunez.pdfIn PDF document text
- http://www.taimaobi.com/admin/ckfinder/userfiles/files/jokujujerafedoburotani.pdfIn PDF document text
- http://vipnovini.bg/root/f/uploads/files/30700352996.pdfIn PDF document text
- https://tumujerrusa.com/userfiles/50683072889.pdfIn PDF document text
- http://kxxbs.com/uploadfiles/file/a/39355224945.pdfIn PDF document text
- http://kbcsisa.com/upload/fckeditor/file/31673094700.pdfIn PDF document text
- http://karinameal.com/imgdish/files/74776690341.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=harry+potter+fan+club+app+apkPDF link annotation
- https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/zizububebuk.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_off0000d637.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD637	18116 bytes
SHA-256: `6716df204019cf3cc6855806359dde4775ee0c7602efc7b0c6d0793c4273f929`
`font_01_sfnt_off0001052c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1052C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011d43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D43	10648 bytes
SHA-256: `9091abaa914bf2980aef91d74b56d7bcc3c24602257d9b8e9641a1202d36e852`

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