Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1f4b54a1afc71e…

MALICIOUS

PDF

86.5 KB Created: 2021-09-04 04:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ee35c05fd5cd055eea660bbe291e893f SHA-1: 19eba3eb165689e6af0150d06760aa6e827b0ac5 SHA-256: 9e1f4b54a1afc71e6127a7b4d6658ab958424f10677318de3ee28b0cd089964c
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure and embedded links indicate it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crysiq.ru/uplcv?utm_term=namma+kalvi+12th+physics+guide+pdf+download PDF link annotation
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/785ng6hnc77284h54hh72ghojm/81304125518.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/6867akjud4qlauanb06r0chhl9/nuxexidovirevamatoto.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/dgpk5q30ifglh23t9aj0k87r41/42797243209.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/10345888796.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d27864aa0---86622847901.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbe0fe5ffc---pixoximowuvizemu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/76076d890379794a5fa2cdeeb1fe974f/13435812853.pdfIn PDF document text
    • http://tamphuhiep.com/Images_upload/files/muzejex.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9b12e9f40---23563601306.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/33843895739.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/fabuwejobozoji.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/famoxoxidamezites.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160afbb8aa779e---gofatevatesefebufiv.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rpkn4og53d74p9u0aeseq9sg90/8018028346.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/4046230982.pdfIn PDF document text
    • http://anm-av.de/uploads/files/dasimun.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa595c5a251---liwiketogu.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ee2d60e1---xasoninavubufap.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/tepototebiwi.pdfIn PDF document text
    • https://rajakedua.com/contents//files/wejatuvutesagidubat.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/wizodibu.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/60832077945.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/boseteselezunakojaxi.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/91337290340.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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 11572 bytes
SHA-256: 242b3a09e51eefe9954b444ad989323c46761901f2308a5b36d0c77bb9cf1c5b
font_02_sfnt_off000115db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DB 20848 bytes
SHA-256: 02d1a915f270b80680376f75bf505d025bf175a882466a5e2771e90f7c11cdda

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