Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbaf5e6cdec6061…

MALICIOUS

PDF

100.1 KB Created: 2021-06-28 21:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5e81482dd75381f501e5238fa2f1194b SHA-1: 65e62d55bf4f260ae5e7a80180449644d0034d67 SHA-256: 8dbaf5e6cdec606166fee0f70a53ae1662fd5e6904a92133694f58444f272547
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to various compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The heuristic 'SE_INVOICE_LURE' indicates the document likely uses a fake invoice or payment theme to entice users to click these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=effective+purchasing+meaning PDF link annotation
    • http://come2menorca.com/images/file/tusewolimaxuwuwona.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/qa176p8q3ar48gh1sv8lbadlre/31234189935.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984987e1a6d---vipirenilusojiw.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef1f594d4f---49501182866.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08503922bb---togibilodawo.pdfIn PDF document text
    • https://codecs.roimages/file/19242252952.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/redegi.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4b1b8f23c95b4de3065a951ad49288f2/bizapozuk.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160917e17b92d5---93470935997.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/3272842123.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/84625354738.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094bfe37607f---nesumotowovunaparevofa.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/a355e906d68a83be532c6951238d30c4/54268662291.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608be4097ae75---zibofekexizijosawigufasa.pdfIn PDF document text
    • http://centronegozi.com/public/nakexet.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/10185514670.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160796160a232e---852786607.pdfIn PDF document text
    • http://polletnv.be/uploads/files/girofetupuvufuzupag.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/nadukafi.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/lopemunaw.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/mipanak.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/fibigirusovofujatekipetun.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/97925962460.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001266e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 16844 bytes
SHA-256: 1334257fba13e68a4de69415226ddd4dc214e78a5b80f902a5baf2999f3e6818
font_01_sfnt_off00015255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15255 10912 bytes
SHA-256: facecd88ef7552919ac7beb1ca457d9707081981d1c98e3944331479cb658c6b
font_02_sfnt_off00016b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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