Malicious PDF — malware analysis report

Static analysis result for SHA-256 7830732db4fb23f4…

MALICIOUS

PDF

84.3 KB Created: 2021-06-09 05:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c0d7b0f1d1d493e9e2caac7e8790473e SHA-1: 5ee662705d33c38a13699b3fa6dd008710767f92 SHA-256: 7830732db4fb23f4c5366e102b8a4c70b196e29fc038195550842f9913a2c743
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary lure appears to be a fake movie download, as suggested by the document body's reference to 'batman dark knight tamil dubbed movie download'. No scripts were extracted, but the extensive use of external links points towards a downloader or redirector functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://inwebjor.ru/uplcv?utm_term=batman+dark+knight+tamil+dubbed+movie+download PDF link annotation
    • https://aedwea.com/upload/foto/32991030330.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/118a70cf1fe0d2bc5d61cae4815747af/vitekefesuwolinitevevu.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/govodekepanibixuguz.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084e602b4c49---42328250605.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/90339196266.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6e1fa1561---10209314839.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0187face2e---dejateliparojaruxefuze.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/lezolazobanikunukeravid.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/34e1d4ed9e2d1bb0fd8399a80bfb8a17/litolorotefowumeru.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/dc8c0cd34e8c430f356adea9c7652fe3/darozitam.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/117daad5ce4d7a7f4b722435346bba66/27885375598.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rf3s1rvr6ek9jrcgq013tv96s6/48839897039.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/02c4c3d693cc807cb0bf99592de3a2e0/55575587755.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/584t4on75ot9pi8rqu3didbbl2/ronavixasizorazi.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/nu5l261hbndsdreh5a0mvcej7b/53883422502.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/81165091798.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c2192fd7---74855794237.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ef37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF37 14704 bytes
SHA-256: 2a1e07f592749a0aa71c029a81fd9e18bd80bb9a076c99e20ea669bd388b0fb8
font_00_sfnt_off0000dd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD30 5348 bytes
SHA-256: 4018ccd783bb22474e4f9455f0d21200a73435c63d83d170b1af0470f3543f3b
font_02_sfnt_off0001113d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 10788 bytes
SHA-256: f55bc6b8ab2c88e8fb80bc0c58d34c5a90c422b18bf5092b0fee6c2127494325
font_03_sfnt_off00013565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13565 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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