Malicious PDF — malware analysis report

Static analysis result for SHA-256 a286e88e8c634280…

MALICIOUS

PDF

85.5 KB Created: 2021-06-13 21:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 199a65ac85ec5318c38f6a118a3798aa SHA-1: f0629cda98b2afc95ec9bafe91d0bc2a53bcd12d SHA-256: a286e88e8c6342808721a4355e44c7e6d388ea22789537b6d966b15fc4d66b06
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://wastran.ru/uplcv?utm_term=f2+full+movie+in+telugu+free+download+jio+rockers PDF link annotation
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b66c14ca8274ab66dd46b99c481a3202/fomixasowufazivito.pdfIn PDF document text
    • https://keongracun.org/contents//files/jisafesajep.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f7133100e187b255bfc5fbf19cdb79ab/87330642952.pdfIn PDF document text
    • http://short-story.ru/upload/file/vibajugitek.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/26c430b21d1a355ad88c1d669f0bb121/28354777582.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16087d4c669350---mewojaduwejibikifojo.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/89604093660.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fuc98fg6v6mmh1atp2vrhe3uja/galewemenupuwilekafafiga.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b216211c0---sibomezelesofikamokunip.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609214faa9b36---lotolivefexabupejifegavu.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/qlrs92ad6euf51nhpvpfpe0hcf/17879090046.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/95155714302.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/doguvizutepegiz.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/h35bggis74o578fcvdi8cppig2/lasiladizi.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215131826523598.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/xolepep.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b24fbec9eb142b076e0e116925ed5ae/wibuwunajuredesak.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 5720 bytes
SHA-256: 6da619128258d04f45d62ab00db486fe5c51513da67e22dbfd77f1fbc432c39a
font_01_sfnt_off0000ff45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 3508 bytes
SHA-256: 57f498897bd6255e5d669c6c4cd61f403f4ad35610affc313cb657f1e5d3bd9d
font_02_sfnt_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 10868 bytes
SHA-256: 1c2ef67b510b6d7db4746702826b0aaf2c3f086a59bbf6bdd4ec42dcb389029e
font_03_sfnt_off0001329a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329A 16344 bytes
SHA-256: 3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5

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