Malicious PDF — malware analysis report

Static analysis result for SHA-256 7058dcbf6bbd1198…

MALICIOUS

PDF

116.9 KB Created: 2021-09-01 05:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3ca861a870b9f15e01b5503c4b4292c7 SHA-1: a713af07d9f12ed4f6d1de9f5d28f9bb22450795 SHA-256: 7058dcbf6bbd1198d00633e255c07dd0090f8465a799fdb1380a9110e04af98a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous distinct hosts, many of which are likely compromised or disposable, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://albesiaboutique.com/files/upload/files/3339888698.pdf In PDF document text
    • http://dmhu.eu/uploads/uplib/file/95128280778.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/duvadupenodiwudi.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/20571a048cf0a56469ba0fc92f9fd62d/budavidigazu.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8bc86a5c2---xabazomilaxatugujalatenob.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a6466ee6dd0---gofuzovusidogiguzetojefe.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f08d6d94---3873039512.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/kexiwo.pdfIn PDF document text
    • http://hilltoplancers1975.com/clients/13753/File/39980329580.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/pupitabofolasufixabigoki.pdfIn PDF document text
    • http://thepducphat.com/upload/files/15011792913.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081a1f96d2c4---68626628271.pdfIn PDF document text
    • https://suksesunited.com/contents/files/taligumil.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/64473716172.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/79263510241.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a161c22808---wotusotopubakizijomade.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb06fcb6b6f---80822709598.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/wiwefofut.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c3e9aac1d---kemapawesamuxebaduwani.pdfIn PDF document text
    • https://biomisszio.hu/tmp/49748683168.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/zefurubepanurom.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/98814757337.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e56442cbf---puwofipexamefobeti.pdfIn PDF document text
    • http://pronobile.de/catalog/file/biragasexotananol.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/nokibuvegosegapab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+of+existentialismPDF 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_off00016110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16110 19920 bytes
SHA-256: 56a930d9cf617098da449c27b80907e88886c0379188278d763ffbfe54fdf576
font_01_sfnt_off0001949e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1949E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001acb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACB5 10552 bytes
SHA-256: 82abcc1bf72074e4c3c8ef119adf4cf7eeb6c0664d43163bc8e21fa3f5971dd8

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