Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5d92a883745608…

MALICIOUS

PDF

48.8 KB Created: 2020-10-28 03:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bb4269ca3ab05a3288eb0bb498029a77 SHA-1: 3448dee64eec0517abb182ab2ebe5086caaa3125 SHA-256: 9e5d92a883745608e951ae6ef66e9df608d56c7434c2f8d7ebeffde7ca76976a
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a malicious redirector link that impersonates a search result for 'west warwick public schools'. The ML classifier and heuristics strongly indicate malicious intent, likely to phish credentials or deliver a secondary payload. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • PHP webshell / backdoor source high WEBSHELL_PHP
    The file contains PHP server-side code with the signature of a webshell/backdoor (request input fed to a command/code-exec sink). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?keyword=west+warwick+public+schools+west+warwick+ri+02893 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8dca65d8b4c.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/tibapab.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/rutuzusog_mebujaxem.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/3083210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavitokolezub/38602659593.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/tigabebovudifilirefuviw.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/52573826020.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bopijejitunizelor.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/memeserok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c842656-6547-47a8-8df4-0d9ba6e82a38/biropadeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee025153-85fe-4696-a03f-407d3cacc4c4/16617631410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45424313-d60e-4021-885d-7c493722c35a/http_uploadsnack.com_nmtkm7_password_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2756/3164/files/dorigonosidosilovebepezid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/9744/6550/files/2574877696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/32182725120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3336/5146/files/48277959128.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://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB2 5892 bytes
SHA-256: 5c94d1218a3cccd8feb0cc8674457b3f01ba87174b1160fdb53792b446f4a2ff
font_01_sfnt_off000081d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D9 11096 bytes
SHA-256: 2a4f47017f0db98e3d5822bf9c52e9900d9a70da0159b377cbd58b3aeb3013b5
font_02_sfnt_off0000a7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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