Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e56abec1d06edd…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 07:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 561873d0d22046c54c28d1e54d5016cc SHA-1: 27926c48533aab2417824cacf71524dc094a31c5 SHA-256: 98e56abec1d06edd3944891ef037f170ce8d1381953bb70dcfa86642394ea9d6
204 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The primary malicious URL identified is http://www.sunarnuricomuisvealisverkezi.com/wp-content/plugins/super-forms/uploads/php/files/47omk485sdmrm8mof2lp0thhf7/55382373419.pdf, which is part of a link farm designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://philabc.ru/uplcv?utm_term=best+gta+5+online+money+glitch PDF link annotation
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/17244801022.pdfIn PDF document text
    • http://juncheng.tw/upload/files/tubapaxurepulibuw.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/bovavinuvorejigoja.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/83846997567.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6b7e721858c8b95fc8232dbd591386bc/wulutimofuzefewigixur.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/xukodoxadekikelomonaterez.pdfIn PDF document text
    • http://zuche0551.com/upload/file/69833661907.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161328baeb7879---6460692139.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/47omk485sdmrm8mof2lp0thhf7/55382373419.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/74124335399.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/pageguwija.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/23146425302.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/rizivuweredegeruv.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/gigivutikibovowiz.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/51847989113.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/kifulovekoduzizakidaras.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/vuzabadudowafutitofufaxop.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/92221314107.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/susaburedekapowi.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/32954451012.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210911_224832.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/falewo.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/32321063367.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/30c5a4a9b3f4b72352c0dc4731dac34b/7291892745.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BA 17652 bytes
SHA-256: 2cd67ddca234995d10b832d4738d8f7198c07d388f6700235fdcea2b59adee01
font_01_sfnt_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 10876 bytes
SHA-256: 16a414d627f42c483aed037ae7488ccd9e02d951a28077d5f20328e951d43b6e
font_02_sfnt_off00012a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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