Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2652cd172549dae…

MALICIOUS

PDF

87.4 KB Created: 2021-05-09 20:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f5753094d13c41b0cda51d2cfe244f9 SHA-1: 71c5786b5eabc30457950e0c36169eaf07c16dba SHA-256: c2652cd172549dae1b3ab1e16112571d2b7c5c196dd26c82ac02a66ea493dfaf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://botokaw.ru/strik?utm_term=watch+under+the+dome+season+1+episode+4 PDF link annotation
    • https://maduvifodowemo.weebly.com/uploads/1/3/4/6/134692972/9933912.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/hp_photosmart_2610_manual.pdfIn PDF document text
    • https://notebatamigoxaw.weebly.com/uploads/1/3/4/7/134715817/xuxofosowabiko.pdfIn PDF document text
    • http://riwopebikiguwa.mywebcommunity.org/bullying_in_schools.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/4118516311.pdfIn PDF document text
    • https://cdn.sqhk.co/gopepilexafi/iijjebS/99627942559.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/Zhjhjjd/87269082543.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/9098389.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/marimejerebo/tv_aerial_cable_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/89853471171.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/free_web_template_slider.pdfIn PDF document text
    • http://mivazofirogo.epizy.com/dinifazawugarifem.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/does_luna_in_harry_potter_die.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/brazilian_jiu_jitsu_for_beginners.pdfIn PDF document text
    • http://bopubinenunoxow.rf.gd/asi_hablaba_zaratustra_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/xodedadajaledojot.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/nedonif.pdfIn PDF document text
    • http://nogojituwizax.epizy.com/40831786727.pdfIn PDF document text
    • http://maligufaribez.epizy.com/mario_platform_games_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/what_is_a_court_of_thorns_and_roses_about.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_off00011770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 5436 bytes
SHA-256: 354e829ee9f96914316614ad25f8487dd3c98cd64ea5f198503e4d002876e4a0
font_01_sfnt_off000129d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D4 10968 bytes
SHA-256: 9de27e2018b6215e0b19bad9eaf067ed38dfddea3c6ce2c7b2c3317d402c5ffe

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