Malicious PDF — malware analysis report

Static analysis result for SHA-256 10628f069c75685a…

MALICIOUS

PDF

88.0 KB Created: 2021-07-16 21:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4333478dd40403bba6beb9f69ed9267e SHA-1: e3ad27cc1b1a7b46010e93688c6adc33a8f3a056 SHA-256: 10628f069c75685a7458b3cbca60f684e9f178533b8e268a827839f341a4f743
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a link farm that directs users to multiple websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish for information or deliver further malware. The document's structure and embedded URLs suggest it was designed to exploit vulnerabilities in how users interact with document links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vtsu7qi0n56i0ejpvlrivakiv6/52494649006.pdf In PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/npgrfoanl62l25j288gn7d38kl/linijezoxesoxijiv.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0de79dcd5e---manudapewotugotevuj.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a919b28f9d0---xodapokatipabe.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f05da8a1ae---vemakikuzu.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/83895819684.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/62lplgrfte3cslsfhmp6r1i7i6/doxepolajebuxi.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/reravaw.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/6559679ba0d4a0d83d0d8d1d958b1d1b/dotaxedesikefunaja.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ec0496440---13881280810.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd45b14c17d---wekogiw.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/46826235703.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/26178961205.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/corubipdrd50gvtuejivais5lp/68086800843.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/xininexosubakokuzeboxe.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/4191700192.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/sqii70tl7fplg8tid3mf745s36/57027409921.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/niguzujub.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f350cd4015---libizukunuvefaxav.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/35752142838.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4kptj4irm218vbvr97na60pb73/vimifiteziwigovi.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/97017212073.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/2ftia54vt5uf8fc8qv0s6j2dm0/puzemapojitawuv.pdfIn PDF document text
    • https://avenue102.com/uploads/file/4928253088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+adventures+of+a+plastic+bottle+pdfPDF 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_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 10988 bytes
SHA-256: 2b7b593bcef1cd3f4a56a83cea4f1a055eb505dd30be599075cd5675e82590b8
font_01_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 17368 bytes
SHA-256: eb0533db862360311001317405bd9af34c8fc6aacadc51172410dc411e66e938
font_02_sfnt_off00013a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1