Malicious PDF — malware analysis report

Static analysis result for SHA-256 3629ed6d569979d0…

MALICIOUS

PDF

131.9 KB Created: 2021-03-22 15:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9090999c43fe9f49491f88645eb9e5fd SHA-1: 8dc9d32f0c6117ef364da677893036621ba08a3e SHA-256: 3629ed6d569979d0139a6e11472023d51a3a34a0666e7f91b7f8a7698035d2cf
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of external links, a technique commonly employed in phishing and SEO spam campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, with the primary malicious URL identified as http://azorocheat1.xyz/fejamerujizulozikod6t4x4.pdf. While no scripts were extracted, the document's structure and the sheer volume of outbound links suggest an attempt to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=fda+nutrition+label+guidelines
    • http://azorocheat1.xyz/fejamerujizulozikod6t4x4.pdf
    • http://gumidaz.medianewsonline.com/hampton_bay_ceiling_fan_light_wiring_diagram.pdf
    • https://static.s123-cdn-static.com/uploads/4464851/normal_5ff98d693bac5.pdf
    • https://static.s123-cdn-static.com/uploads/4408586/normal_5fee05945a442.pdf
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ff8ce66ef779.pdf
    • https://static.s123-cdn-static.com/uploads/4387406/normal_5ff8f68a1f328.pdf
    • http://zipubezexupoka.mywebcommunity.org/ruviguwedez.pdf
    • http://fbcopyright-center.com/80399596085o6kxc.pdf
    • http://zozavelomidabi.scienceontheweb.net/wordly_wise_3000_book_8_lesson_13_answer_key.pdf
    • http://dsv-trening.ru/33974931367hbqk1.pdf
    • http://hurleyshamburgers.com/download_gta_san_andreas_apk_data_200mbg44pe.pdf
    • http://zakomuxoza.getenjoyment.net/lifetime_44_impact_portable_adjustable_height_basketball_system_90670_instructions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nizowozutagele.atwebpages.com/how_fast_do_rockets_go_in_mach.pdf
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_eb2fbb2316094ee6bbb8a29976a67103.pdf?index=true
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_afde98ba33754e4ea997614a01d94eba.pdf?index=true
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_a27d0d3e9e404a1d947ff2e126641af2.pdf?index=true
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_2e3f1cb471f2415f9fce62123d8e40b5.pdf?index=true
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_7f62e822d3bc4660a215a268eaa1792d.pdf?index=true
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_cfb5438e7188434db178ed43da1c31b2.pdf?index=true
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_8eed1a1259114c61a72b887c5f1d3e98.pdf?index=true
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_0f8626695cd04c05a6aa289ad047eb14.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bdd9.bin
eaa7c14989461158791b382404f1d26ccbb01f0dd942d6b20a5ec5f55462371b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDD9 4972 bytes
font_01_sfnt_off0001cec7.bin
e89d779213ffd44fe4380f5c047435d2bcc8812f40c4387ecee8d2ecb4fd3b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEC7 10952 bytes
font_02_sfnt_off0001f3f1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3F1 4324 bytes

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