Malicious PDF — malware analysis report

Static analysis result for SHA-256 97066d3d4c3496b3…

MALICIOUS

PDF

76.5 KB Created: 2021-09-04 11:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 868fe853497f0aab3b687134f9cd7857 SHA-1: 7e5b31726d9c2590db3f0f817ff2dbb00ff0a120 SHA-256: 97066d3d4c3496b38afe23254deef72a8d9ee718417f98624bcc13560bf942e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous external URIs pointing to potentially compromised websites or disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=abraham+hicks+focus+wheel+pdf PDF link annotation
    • http://kubabus.cz/novy-web/upload/file/82332089574.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/dupajirizopo.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/funawerasawo.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/webapixasabidilakef.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8bd3ab002---31162913517.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/7369633547.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/812f236ac914f92259bbd92f1fd4079b/70463228278.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/f086a1d6cb89f08b70a27b3f33fcbf3b/13707353774.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/wekalumi.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/8793036e5e95b325372d46ab465a5c4d/45204066406.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/gufewuv.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5fa6335742dae5440021ef4b14c219e7/31197124468.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/20304581385.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/osgto56bgmjesbeekfh6nio625/58798657565.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dabcd5695c---wiviwalege.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1a402e8d---purifenilixeg.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/58090888403.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161064f01e9b69---28195479976.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/joburilogofupebov.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/tofipuwujakoge.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/redabinaxuza.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0ab91a631---bovofugigizinap.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/nosokalajir.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_off0000c6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 17060 bytes
SHA-256: 10d3cac9b78f88d4aee4ef95e8ea54569646a9bc69229dfcbeacc5291c764ab6
font_02_sfnt_off00010ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 11084 bytes
SHA-256: e19ea39e02e564c7bd49c0fa0d9ce75608599cba4bd8fff6970ad432ee0ea415

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