Malicious PDF — malware analysis report

Static analysis result for SHA-256 04acadfff4dd74f3…

MALICIOUS

PDF

76.6 KB Created: 2021-10-07 11:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 548f57125e355a8f2045089897bdb634 SHA-1: 763cb4b8f0307f5c8b9c8596f9900193064f434a SHA-256: 04acadfff4dd74f38a4d929851e579af50097950fe3ed7628e9b2988d9a668b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to various domains, including one identified as a compromised CMS upload, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210901212144.pdf In PDF document text
    • https://webaruhaz.solar-napkollektor.hu/js/ckfinder/userfiles/files/53024792850.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/85170040644.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/14207367407.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/sobujapuponezebidedukogux.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/fpo6a7rh6kjkcelt0r8e8kuuh7/bewuroruxunolap.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/fajas.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/38910508532.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/70140034156.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/jbjsjv0dpotb08f80dsgctl13r/xanokife.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631236576.pdfIn PDF document text
    • https://miet.hu/kepek/48341507703.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210913152144_1662619621.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210912_1567FCC34BCCCAEB.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/72484338220.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/64639273364.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/joxibirabitegizuganone.pdfIn PDF document text
    • http://word.mn/uploads/assets/wezesapifivifow.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/xugotoleberojiwodus.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/rapokepirafagekil.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615a0651893ba---94419787470.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/livumaduzovafidut.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/xolerusirexokefonexogonal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+greatness+guide+by+robin+sharma+pdf+free+downloadPDF link annotation
    • http://www.thaiticketmajor.com/static/imgUpload/files/ranokaberivitasinemabo.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_off0000c7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A0 16700 bytes
SHA-256: c0ec37df9a2a5495ae41b9c4885567a86a67e0cce2ab0df3c67cb9b6eeeda9ab
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 11348 bytes
SHA-256: 29c3f71916a0dbb63263363ad553730a4a24acc625c8fd0908465b9f4604727f
font_02_sfnt_off00010c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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