Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3053d3911ae4cb…

MALICIOUS

PDF

39.7 KB Created: 2020-11-02 19:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b1e64052367e412aff6074a825ac1365 SHA-1: 8644a423708c95fd654748d8237e42b687269221 SHA-256: ce3053d3911ae4cb0cbf421487f2846c43c36d567b3641a6c113fcd7e8edcc89
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, indicating an attempt to lead the user to a compromised site. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links on disposable hosting further supports a malicious intent, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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=messianic+aleph+tav+scriptures+free+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5f9fe6360511f.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/996d4b1.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/f148af38ea10.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/jojusuwobanuju-jejimupojitid-gewesawezupug-vipunufa.pdfIn PDF document text
    • https://pozosukezogi.weebly.com/uploads/1/3/4/3/134386022/0c7155bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5f9a1aba74ce7.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/cfae5604d87.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/pamokabumafapi.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/2568472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gomakobez/causative_passive_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8dae0b-1314-40dc-a92f-6a406c9f0a72/88426256924.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/sevowo.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/pizusuresagogixifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255aca47-28ec-409c-9aa6-bf989728f68d/wofivimadixijizonenaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/98021240023.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/5th_grade_math_worksheets_common_core.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/bangalore_metro_map_phase_3.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C72 5308 bytes
SHA-256: 8a463113a8f3f04fb318b3208ebef7849811f7d218b564a68875e7dee5040112
font_01_sfnt_off00006e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 10240 bytes
SHA-256: a378bbd7acbc50f83225b8a87148fba429614d21cdb545f4b8b292b4f769d174

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