Malicious PDF — malware analysis report

Static analysis result for SHA-256 64051a035f0af52a…

MALICIOUS

PDF

86.9 KB Created: 2021-06-19 21:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4ef877b1427fb4a41dd391198786a4df SHA-1: 2c691225742dadcb3b835e2362fd6d928dd9a4bd SHA-256: 64051a035f0af52a46fb062ca877909a9d420314483cd238aec9a741e318598f
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, primarily through its extensive use of external URLs. The presence of multiple link farms hosted on compromised CMS uploads and disposable hosting suggests an attempt to obscure the final destination and evade detection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware.

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://drafthe.ru/uplcv?utm_term=lyrics+of+aalayal+thara+venam PDF link annotation
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/42965cb4a2af950724df9a1c083821bc/96809913858.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8032e2e798---duteronakisabiliro.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file/%5C/sajodofopugelodemuxu.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/5ehf36u8ppbm47eoi1a3h8loe3/lujilugaxirotul.pdfIn PDF document text
    • https://okvino.it/file/70923121958.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3c87dbfa31989be14af977a10466574b/sagixodiwuzepi.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/wadewilewizenilirodokib.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608273fd2bf1b---99980897851.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160910b1f365d2---61118777024.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7b9e67ac2---nelaxusanateb.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/u9en2ggbnujqi9nn1g53hvp838/pajogu.pdfIn PDF document text
    • http://rotang.net/userfiles/file/74207814004.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a229cb454ed---66592863573.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/fe2db087bad59b6480a9dbaf8190b6ae/50236912671.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/b4a0kd59oveoc4fkq88l9p7bel/74113958380.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/0fd8fe76ecfc88a1f0a428201376e887/68474248483.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb1bb5c95---rebidevapofafedegefa.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609698074f8c9---82328201574.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f0c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF0C1 18284 bytes
SHA-256: ddcef82b7e442abcec63f55c8989b1342d91193bac3586c1cdfaceafd317e316
font_00_sfnt_off0000df1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 5224 bytes
SHA-256: bb0696f4b337cbf1b6737db635ca69712f9ac07a15ae6f089d2c0c97a2eec1cc
font_02_sfnt_off00012905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12905 10476 bytes
SHA-256: 182179e1e58dc8503412a817f3a71697237325e84163c7320834bf5bf66e162d

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