Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15e55cc973d7901…

MALICIOUS

PDF

86.9 KB Created: 2021-03-03 16:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e047bba418ee83b7dc4844b4b70eada7 SHA-1: 1c3cfe4c41be9210c41f2d2a70aaf0aa128ea027 SHA-256: d15e55cc973d7901d57dc44ab1d8b2fa7af8fa35dba4ea7ab809af5f2c280e6c
156 Risk Score

Malware Insights

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

The PDF contains a lure for a 'free download itil foundation exam study guide' and includes numerous external links, many pointing to other PDF documents, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution via the primary URL. No scripts were extracted, but the PDF structure itself is used to host and present the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=free+download+itil+foundation+exam+study+guide PDF link annotation
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/2755356.pdfIn PDF document text
    • https://nidukonijeso.weebly.com/uploads/1/3/1/3/131381088/mojopupajivotowotaba.pdfIn PDF document text
    • http://retamos.mygamesonline.org/gargle_with_apple_cider_vinegar_for_white_teeth.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/7046033470.pdfIn PDF document text
    • http://onlinetiser.website/49012353817duets.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/7785901.pdfIn PDF document text
    • http://peuly.xyz/vovikutabavilazevewon3u3cy.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/fasozamalaxutije.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/biwubeleba/apex_legends_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/arms_reach_co_sleeper_bedside_bassinet_instructions.pdfIn PDF document text
    • http://wokidomogu.onlinewebshop.net/jadanoxawinuginedu.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/zowoxinodozagojolodomem.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/pinagan.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/ralima.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/imprimer_les_formules_excel_2010.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/63118014793.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/is_the_movie_the_book_thief_a_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/81744436646.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/inspire_high_school_students.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/the_boy_in_the_striped_pyjamas_quotes_gretel.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/business_continuity_plan_template_ppt.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_off00010e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 5444 bytes
SHA-256: 2fc56d3448dd46909ca461e902260d83db0715e3f65840c19d934efd30914fa0
font_01_sfnt_off00012133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12133 12928 bytes
SHA-256: cf36c292a5a13485eaf15489397983c7ee3773ada79ada192013b883a3e18088

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