Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75c98b9a8d2cf18…

MALICIOUS

PDF

86.7 KB Created: 2021-09-07 01:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9496ac4526ae82818bb3d938c883b252 SHA-1: 02ce8e4833cd14c7cba23842cdbc308809d4a600 SHA-256: e75c98b9a8d2cf18896412e71452844410d43cee1b4d9e7a95e5a3f407e1373b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=pinzas+quirurgicas+y+su+funcion+pdf PDF link annotation
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/lolabewepixul.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c262a4a42---tekogazaxemubinadidofu.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e69c171fd---mufopugig.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/25310410035.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/87382803328.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070796366e82---tujuninere.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/82762544357.pdfIn PDF document text
    • http://giwajib.com/data/editor/file/jexabunenixonafikaja.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/xovavavunolabuzitudise.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f9b45c0db2---diruwotebisa.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4q1vdtj8dokk93dsdgn0t6q7dc/pijakegafejirezavejon.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/93418874836.pdfIn PDF document text
    • https://davaocarrental.com/images/file/1708638861.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/80743762422.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/dusapetunadosow.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085798535ad0---masasakimilekopuva.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wevev.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/wibofovaguted.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/dutusuwudidogis.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/vurabukezuwuwinugexema.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607c980ccfdd3---3237355736.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/nosidisiribedexopu.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/19066132125.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31c6d7b93c---20150821316.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/58059316606.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_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 19744 bytes
SHA-256: 152bca299c0bab04243406ced38849f29d4c98e85aa57b8f1d4930e50c94e743
font_01_sfnt_off00011be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 10940 bytes
SHA-256: ba7d174219ec792bb560afea6787cfdb31d3b68700c5d15d8528b303998fb008
font_02_sfnt_off000134e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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