Malicious PDF — malware analysis report

Static analysis result for SHA-256 84615e18947cd93a…

MALICIOUS

PDF

86.6 KB Created: 2021-09-13 22:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4eefc45cf07f8e3cf454af91d09794bb SHA-1: 8f7a3ce86a2b4c16bb0d9cff95af8697670cf55e SHA-256: 84615e18947cd93a86ce1d3ffc9bfed0f0d8acfe3e1f2ae76e61fd4079d8ed58
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and numerous external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content or visiting phishing sites. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pistant.ru/uplcv?utm_term=download+my+playhome+plus PDF link annotation
    • http://regmac.net/userfiles/files/madib.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/bibatovofifo.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/tonuwoj.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/q98te2k2bse7hqfeaqc1n1v1c4/88524370204.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/58299688305.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/nagitomuxujokarawapa.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/37372270477.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/sibeladexezavuneriweka.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/zatijopupoti.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/83229696508.pdfIn PDF document text
    • http://come2menorca.com/images/file/bofuwamut.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/31711187557.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/subenopogeboxu.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/94297312138.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/69952333546.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/gifezosubunuzi.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/wilogojowetadonanajagi.pdfIn PDF document text
    • http://speckrepej.com/upload/file/67813438657.pdfIn PDF document text
    • http://haki.vn/uploads/files/16965399834.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f52ce40131---99262833187.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/zepixevakiredekovagan.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/vakiwajexonijutabijag.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0c1cd9684cbea083547b7d5ad094890d/92821745736.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/befatekefo.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/vopotupijivun.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 17100 bytes
SHA-256: f0bc92d33481478c164c5309fdbe4ddf30fd50f3b3797bb7425ef43c6c060f33
font_02_sfnt_off00010664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10664 10668 bytes
SHA-256: 42f816570716c1446833be983aeed6117c9bfa2c13729ebb64d545e061ddcfe9
font_03_sfnt_off00011eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAC 17244 bytes
SHA-256: c34c2c559dbafd5ae14b51930ff823cf7251e19827173dbc23d533e927f3a9a7

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