Malicious PDF — malware analysis report

Static analysis result for SHA-256 14866bde9057ec15…

MALICIOUS

PDF

83.6 KB Created: 2021-06-28 03:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37b70edfd96a0f93966acc85cb33e248 SHA-1: cd0d2de895437d59bd6c8588bed4d381c32eeaed SHA-256: 14866bde9057ec1552d9b80cb17bea0e549ad8a63d894bcc8b42bdfb461c7930
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=transfer+of+shares+agreement+pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/504eac0156a368acf7f5ec6059735112/58313147113.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1238631189---danunujisonutejivix.pdf
    • https://telenovella-bg.com/files/63772495956.pdf
    • http://bularz-auto.pl/images/userfiles/file/rejorizibu.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/klv6tal5d1ngqg86nva072t60a/35813849476.pdf
    • http://afgventuregroup.com/cfiles/file/wixukikupimivagomevo.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/nv9c07djb1r9hn59cl9l17dsct/meninukaxalapi.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802895f1f65---82256934563.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b736fbea346---70047612324.pdf
    • https://capitalsyndic.com/userfiles/file/lodirelolupulaxotox.pdf
    • https://immo-macedo.lu/userfiles/files/38144142927.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/81340102995.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9274ccacf---bipuvuraguvo.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c8ef2c7e24cc32ca4d5dc3c56baf9922/6982073626.pdf
    • https://educhina.mn/editor/files/88345419031.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/lapuraxinoxag.pdf
    • http://gphs84.com/clients/866382/File/73245051996.pdf
    • https://agrimal.pl/userfiles/file/43402012015.pdf
    • http://ruilong-ironwork.com/CKEdit/upload/files/70938684945.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/32e5d6afe391fe3a815fc3e8ae5ee59c/vujufumoxufubigozaruve.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a08526464a5---19570340338.pdf
    • http://caratow.eu/userfiles/file/xokexugaz.pdf
    • https://egca.fr/userfiles/file/wexividoralawiwudiz.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/eb384247e4becdc88bf195cdf1772216/4257152821.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e40b78bb---67802000429.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 16792 bytes
font_01_sfnt_off0000ff7c.bin
9f7e500a429505156ca25b69716f4b78805951eb906e23b558d3ad4b45d74b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7C 15920 bytes
font_02_sfnt_off00012880.bin
140824f718a97e8d14bd89777df99465635b6492c94b5a1b967e2f328f96c57a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12880 10772 bytes