Malicious PDF — malware analysis report

Static analysis result for SHA-256 4575f14d1705aec6…

MALICIOUS

PDF

80.7 KB Created: 2021-10-07 00:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0047cc755785daab0292c2f4c8e9ca85 SHA-1: 62f04dfc9e93ffcccbee883e4f1bd7d6c55e2a7c SHA-256: 4575f14d1705aec6c892d56cd182ab672f80cf69e18ce39ff90ec842a1117be9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://nomylo.ru/uplcv?utm_term=jimmy+kimmel+with+mike+lindell PDF link annotation
    • https://rheinfurth.de/userfiles/file/zovafujiru.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109131032458478.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/tonujumevowijetiwujame.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/11191201338.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/35076829165.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/12398300895.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee73c852be---filetijizuvo.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/mexuvid.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/8998142980.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/xekukebutekapize.pdfIn PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/naxofagej.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/83411884743.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/dikatebejamikezumanezof.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/70681452487.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/qhun0ls6jqfanihis2ibtggc0d/ramuwa.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/99f6f114a1a651925f795985cc24c392/mudesilewime.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/towukevigudobolibiga.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/bupufopune.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/vunaduxawubasuligatoguda.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/vesubipugir.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109172158596616.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/zefajitiwepasagetefepe.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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 17316 bytes
SHA-256: bb50e1c152d611b8ccd1603cb8519a524fc5bc5ac2b6d02b9bc7667520a96391
font_01_sfnt_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB4 10248 bytes
SHA-256: 273e16bcb957868dec088bfc64a2a41ce0eb21e7ea16215567ca7fc28830ce17

Open this report in the interactive analyzer, or submit your own file for analysis.