Malicious PDF — malware analysis report

Static analysis result for SHA-256 be000f4d59b19cbd…

MALICIOUS

PDF

130.3 KB Created: 2021-06-22 12:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a57148d98b59176847da41340bbb790f SHA-1: a0b1c82b8320d71508c89c1b5cf9338596f34e39 SHA-256: be000f4d59b19cbd93321b712a7a68eda28765725674c0b9ad01860febc2e0f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to trick users into downloading further malicious content, disguised as movie subtitle links. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to facilitate the download and execution of further payloads, likely through embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://archism.ru/uplcv?utm_term=3+tamil+movie+with+english+subtitles PDF link annotation
    • http://au-zlato.sk/upload/files/sizivitoxumanamowa.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/0937dd4178f58d42a7a8bd75940f08dd/61701104285.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9b00dcd27---gotodesukezabanub.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da8c2bec38dd75b827e7eb7f0f336ce8/68149827030.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160752a7c3843d---dudedimojivozufiteg.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/22452410232.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989e26c47d0---zeratezedupesilu.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/gewirivapakuboluwaxo.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c4d01cfe1---disogovazedinizapala.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c9f41867d---wibezulonebotururivat.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/b580ebd135b3fd1d1ccceb75234c7d92/sopukibuv.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/petuvaginirid.pdfIn PDF document text
    • https://wagaskar.com/media/rafezaxav.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/vqk482kan96d9t07m6e7b4asm5/kizapujumejabasuwup.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/12878813708.pdfIn PDF document text
    • http://93564497.com/userfiles/bedukilux.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/woxikafekijezisojide.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/20010358607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off0001b43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B43C 5248 bytes
SHA-256: 09b386c9ce45a7c0671f3a9b7ddf37fbe0cbb8de5ed8ebe33f51dbb05815383d
font_01_sfnt_off0001c601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C601 11596 bytes
SHA-256: 9b8718c34f5737e6a2d20b5a177f46c68eb6ed2c8404a59fcf8836820a6cd891
font_02_sfnt_off0001ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED4C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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