Malicious PDF — malware analysis report

Static analysis result for SHA-256 932f062a6932a0ab…

MALICIOUS

PDF

77.5 KB Created: 2021-09-20 05:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0571834856999eb02233643ebf7d56ba SHA-1: ab6b42d3460a38796ac27d9e6a89b54e80cc509e SHA-256: 932f062a6932a0ab5472fafc50fb074d3a9fb83e848a9d9ee5ff6ef11cfed27e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The PDF structure and the presence of JavaScript point towards an attempt to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://movimientofamiliadejesus.com/images/uploaded/file/26641648863.pdf In PDF document text
    • http://roseeskin.com/userfiles/file/20210901181829.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/50650784472.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/sebajurapetixijipelomo.pdfIn PDF document text
    • http://cissi.it/userfiles/files/46390692439.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/jivugobagokisotewenawun.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/xujare.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/45977811240.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210915_B2A7DCC48C00CF18.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/78421375047.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/bubobemununuwubofikamuse.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/nuvegugezowavafewidu.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/69235542352.pdfIn PDF document text
    • https://fishboat.hr/files/65494033917.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/kagofamaduto.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/83916804187.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/funumude.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/pikepaj.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/82913745599.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/xedogeluf.pdfIn PDF document text
    • https://keongracun.org/contents/files/tuzinozixonu.pdfIn PDF document text
    • http://popmetre.com/news/files/70639174402.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/xerome.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/16939482739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=android+intent+mime+typePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CB 10272 bytes
SHA-256: 70db571d1dabd0aff96120702ff78d82fab0b83da2b25217d5c019d7b719e280
font_01_sfnt_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 20956 bytes
SHA-256: c7554583821a5eb633d1a068eb487688599d5fc5c5920866c41016576d09ff09
font_02_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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