Malicious PDF — malware analysis report

Static analysis result for SHA-256 0376800f7eec2a9c…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 17:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3cfc2f7f8340c0c4fe09a73651f9824e SHA-1: cebc204b4d0c69b793618edb91b531ccce4dc85c SHA-256: 0376800f7eec2a9c06c41592bee4b51aceee89dc1047c45e278b17c95fb76a2a
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=parmanu+full+movie+download+in+mp4 PDF link annotation
    • http://ylplj.com/ckfinder/userfiles/files/82738537683.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/fj8cdq953p8knt3spage5h8l1t/97098569066.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/bupefadudofonawa.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/51611156535.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/94631391150.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/getuvexavatojikumezepanu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/cf379eebd55f644e8e9efb2222258fe9/1722744267.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f76f22eb13c60436537efe152aca31d8/73508230902.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/35356306647.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/30935228544.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608544e8143be---babavoka.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/16731752864.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/jafoso.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/14171539705.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/rupevituge.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b073abe72ab827ad4bc0954da7dea676/jalidivinizorarajirosobe.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/0d3302f2df2e842fa36e9e9de925ca96/40761040814.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/67996533387.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8538fd7589---73945593810.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917bc46ee07---xupazubuganasajev.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/agd4leul54rgpeqggeojpvv5jn/57437432213.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/pifaw.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/edeb14685832532409ed5597f659a9cc/menisopodofujusometo.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/gupevuremijekokipixikiren.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd5990a86e---91324483890.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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 17268 bytes
SHA-256: f52fc3b06608994b905112bbcbe27242d8e05a86bfdd37f795d0b108b2753f00
font_02_sfnt_off0001184a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184A 10724 bytes
SHA-256: 397b7f39bdb637f7b972123df6acece6ba094118383d95e27967dfa474582bbb