Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4bcd2e3dd61071…

MALICIOUS

PDF

79.9 KB Created: 2021-03-14 10:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3fe727ae2461d10fc012813522c8fb6c SHA-1: b56da19f029c459e1a184ef3777e146e514934bf SHA-256: 4e4bcd2e3dd610718e93d9412329902eda5fb6bc873226eaa88e14d91419d3a0
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one notable URL pointing to 'maypoin.ru', suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains keywords related to 'cpns bandung barat pdf' and application metadata, which are likely used as lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://maypoin.ru/award?keyword=cpns+bandung+barat+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5fe6532cdb5cd.pdfIn PDF document text
    • http://viwaginuf.iblogger.org/what_are_the_steps_of_closing_process.pdfIn PDF document text
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/jemun-zenipizo-matanoxewegesak.pdfIn PDF document text
    • https://patobozojewe.weebly.com/uploads/1/3/4/8/134863794/zuberumonibalufob.pdfIn PDF document text
    • http://votexetoke.iblogger.org/commercial_soft_serve_ice_cream_machine_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_602a4032f19f5.pdfIn PDF document text
    • http://nufurimuler.iblogger.org/sql_server_2012_standard_sp2_iso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_604141d8684e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_603577e0b457c.pdfIn PDF document text
    • https://duvozogol.weebly.com/uploads/1/3/5/3/135314926/gusipenetedifopaboze.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/nutep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_245be630c64e4a519789a42083cbed62.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b32d18-df44-4265-9e75-a45f216756f2/vegumamubexatasa.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/92818919508.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_2523a770ba02465cbadab2231d292c7a.pdf?index=trueIn PDF document text
    • http://nobudusoselazo.epizy.com/54964953686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e97e419-be00-4232-bf88-fef14ba4a571/xojoretalofemusulin.pdfIn PDF document text
    • http://datidogebe.epizy.com/database_management_system_tutorialspoint.pdfIn PDF document text
    • http://pumajamidu.rf.gd/80000304301.pdfIn PDF document text
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_31679bc0c3214e91a0e819c106a17640.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d4d163-cc34-48c1-a77b-c29c4ef907eb/what_is_the_typical_music_of_cuba.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_7b8560c50c5e4bc1a80afb8fe7b1335a.pdf?index=trueIn 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_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 5220 bytes
SHA-256: f355b31ce47e8617763a50e262147ecc5fd7f15d2a5d030948ee12160d2ddaa8
font_01_sfnt_off00010bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF6 11188 bytes
SHA-256: 9fb11e518cca8f9dd7dbe55a5cfddb1cf5f1db45840f6a59a7cbab634cd7c71f

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