Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc70002e5c55fe1…

MALICIOUS

PDF

82.8 KB Created: 2021-09-07 17:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: bbee487e00c0dbff62196ed13aa47f46 SHA-1: ad771d50ebd9ce193332210255884bf77c061e15 SHA-256: efc70002e5c55fe1781de4f54407829765a28ccb942319ea616480289815aac6
136 Risk Score

Malware Insights

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

The PDF document contains numerous links to potentially compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The heuristic 'SE_SECURITY_BYPASS' indicates the document explicitly instructs the user to disable security software, a common tactic to evade detection and facilitate further compromise. While no scripts were directly extracted, the overall structure and the presence of embedded URLs point towards a downloader or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 http://terezszilvia.com/images/uploaded/file/7459085791.pdf In PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/e98j8t7eq9q2q97peqa3v9p288/23582885753.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134fc4c0b3be---59873330274.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/81520404953.pdfIn PDF document text
    • http://myqself.com/upload/files/nagebixuzagolo.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2be4c689e803d6bc8e51b6d5b609e3da/modulimapix.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///11481877545.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92f891bdd7---zutajekapotiwutejata.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/29710869930.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/18271487816.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/37478256619.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/541da54458a1f8fa654cab5f262d9001/bawodiwemolemi.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4bfd47383ac82979bd49438d9364646d/17583435823.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107e89f5704c---jabitokojegefuk.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/48160527499.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/topelidozisejose.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/masefajafipisilemuteriko.pdfIn PDF document text
    • http://www.zima.snowcat.pl/admin/ckfinder/userfiles/files/sorokulabevadefoxi.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/sepaveguxexosifaleperem.pdfIn PDF document text
    • https://motacademy.it/file/zixotivadogazil.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/gikoroxipadekusabanitezek.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ad0353b26---wodesevavowonin.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/92599356305.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2jevdsthsuo43n87mq53vir1k0/24554307876.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/jamix.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/jumeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=outlook+2010+won%27t+open+pdf+attachmentsPDF 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

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_off0000dedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDF 16820 bytes
SHA-256: c7cde44bb1ac229e0c7d8f66d4a811d7cc1613297fad04b68d9900a328a45d2b
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 11324 bytes
SHA-256: 67712c44d74ab3a7b2f7d691ed32599e74eaa173d956e09cf70ba8038a29b390
font_02_sfnt_off00012547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12547 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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