Malicious PDF — malware analysis report

Static analysis result for SHA-256 926764ee7ac45b4f…

MALICIOUS

PDF

89.2 KB Created: 2021-08-19 03:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f28cda67e33fc01f7aed741e44acc8b4 SHA-1: 751d213d24310d4a280cb868b15a92aa769012ef SHA-256: 926764ee7ac45b4f1999607b0017416b529c7508f02efb8e6d473b3b3279cd4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://garglob.ru/uplcv?utm_term=pokemon+diamond+and+pearl+download+ios PDF link annotation
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd3535993a---57394929747.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079529400e58---jufiripotevuxotupejetezam.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/9cf2a3993c5b084e48241c1978fb6f0b/fudiranewerisazozegoxaje.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbef178d6d---99637945280.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/baripazatu.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050222055784.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/76944537330.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nirokoj.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210504060534518253775.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/59040191084.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/48814488056.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/furodozefedumib.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/24032965835.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d74a659e03---5651930089.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79d62ea76b---jupetatenu.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/21361554044.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/bekuwojepozajusuzirafif.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086c2496a2e3---muvuw.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9cac1a76c---27418452283.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f3cf2919---sixunonefigu.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ee472f18d70---wogokewilubij.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210503134429735.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d912c8bfa---53643513998.pdfIn PDF document text
    • http://ezibra.pl/upload//file/19602177492.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c4c1977a24ba96864f9dcde16d6472e3/3899486432.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 10636 bytes
SHA-256: 363a896a2c44d68e9605fa699877ca34d8b9c9fae4964ff5af57a5238a8bd8d2
font_02_sfnt_off0001109c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109C 18108 bytes
SHA-256: 8967e80a37a190082b4541076243f004782c4a4569046424edffdc02d680e5f3
font_03_sfnt_off00013de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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