Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fdf2d0d6388138…

MALICIOUS

PDF

78.1 KB Created: 2021-06-27 05:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e2ecbe5421a871a3083ec6febdd0364d SHA-1: e7026fb827c22c0a4de5d32fdbd401c10a9d2d27 SHA-256: 27fdf2d0d6388138a26d6d618232c7cefccfb1e0863e234d908aec52744f24bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs strongly suggests the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=eid+milad+wishes+images PDF link annotation
    • http://wccflooring.com/userfiles/files/fasejenex.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/465dee755bf491f7df0056e292ef9630/73574242200.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a9c1bfdc---letuwajarudigenerej.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d3528056e---limovusiganu.pdfIn PDF document text
    • http://momsystem.ru/public/file/39112973405.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/jubami.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/378ba718d00898afc732230fc65424f7/jalefojon.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d804dc78fd---14553203661.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/46223210141.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/de5e11fa1ca9654880407d9351303e43/89013054293.pdfIn PDF document text
    • http://derma-dts.de/files/file/xexoxepaxetifobobudap.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d903e4ddfc---47200760095.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/4n8qev8fsv227mvoidvhsm7knn/3562053572.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/rovakilebamet.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/hsn6juu1rsj7n16imukihtnsr5/51444232548.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/179d28618d5a3439d9a9d13d1665670b/xososusadikobu.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/26f82fdff956b32823ad958cd8cafaec/dakurenorubegi.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/pagapedubokikufigobikeva.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/juwilek.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d8e8a113d---nixatavomobe.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/468dc6d7a7d8b16365faa865d77d1c01/35955685583.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/xebejopaz.pdfIn PDF document text
    • https://tavio.ru/files/file/tugunazowidofipas.pdfIn PDF document text
    • http://70sromans.com/clients/871711/File/78057486371.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_off0000d03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 10340 bytes
SHA-256: 228e29c3b19cafe950e53c4096d72fd79256ba6fc01da6ce2af2b4b68d28894b
font_02_sfnt_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 17112 bytes
SHA-256: 9f8c88c2f99d80f0a9a34d4ad1d9c666aaaefe53f4de78434d500587939ff853

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