Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb45e1b56472f055…

MALICIOUS

PDF

92.7 KB Created: 2021-07-19 11:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2f3d7e23a152609f7fc8248a64f0a5eb SHA-1: c1572eddec80c1e64b2d0ac976b79f578586ca0d SHA-256: eb45e1b56472f0556014114e4315b6349335e25b6e44a424994a0ae264066f7a
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. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ge30vbkeap661j67h4edjl1eq7/61042915454.pdf In PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/87da25e184896e0a702bd2e0c070caa4/rutivaso.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/tamalukurugiwib.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/63206546044.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d44692767---mifogiramavanuji.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160736ab019448---82807227772.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/d4d13fda36dde2d6e81c5f7d5f0ca0ac/deluvuresa.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/87668739415.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746df151cb2---40838850850.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/saxuliguvejotazidafetebo.pdfIn PDF document text
    • https://synersys.fr/contenu/file/fogusujefosi.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/5l8k396775vngf7etp37e7k7g5/bunuboxusatux.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94ee711697---83782316513.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/budazarukigug.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/wedazugu.pdfIn PDF document text
    • http://didula.com/img/file/54573001994.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/tijazizogomixojaji.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1423ee6a5636bd5d4e7c5bf5750c86ca/faxifezuz.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/56bdbeb5abc6943774dc25d8c0a3430a/14821986321.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8b1599b52da5fdf80e3db006f331647e/rapuduvovezivulipiseziwi.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/runejixinubatijekeji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a69b7ebc2---4413289314.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=avengers+infinity+war+tamil+dubbed+full+movie+download+tamilrockersPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 11396 bytes
SHA-256: a732bd467727bacd9bd27c93c0bac5050dae4d99487031c0d7b8dc388a663e16
font_02_sfnt_off00011ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA8 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_03_sfnt_off00013415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13415 18452 bytes
SHA-256: 4e9759212948edbc055165cc08e3046fa2b77baedf441670816eb5c8bd56b20e

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