Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c0cbcdceb1c57f…

MALICIOUS

PDF

139.8 KB Created: 2021-09-04 12:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e3cca9222242c058b75d0cda586ae864 SHA-1: e501310847d13a026f99b1b58ef4c3360c86d121 SHA-256: c6c0cbcdceb1c57fd0ae29aa9b7c38a95336b958026f2eb1c60d724e5fad40a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://garglob.ru/uplcv?utm_term=psc+jobs+2019+pdf PDF link annotation
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/960270521f35f9f4dcef9999ddb03cc3/lulafurufuxe.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/1v58vqis08e018v36ffljne6i1/39717661484.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/4a003491e3ba6dab0efca0841431ddea/59946651437.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/86116195608.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1611b245ab6bd9---jetowumavijurazikojez.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/xabixobesosomidas.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/diwulemalugoruli.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01cd2c597---38852461488.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/nisinodixupedew.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55f3534fe1---8245929345.pdfIn PDF document text
    • http://maxbrio.kr/files/files/12600634189.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/01bc3e1d7eac2d695089776f2349e4e6/69592142325.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc6940e30d---71093171874.pdfIn PDF document text
    • http://talleresjpg.es/img/file/mezimi.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc1906699---1385839099.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/zifatixa.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/fenemegiwapediwuz.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-8-17/20210817012024158997.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f4503e21d---80634880667.pdfIn PDF document text
    • http://hochrainer-elsner.at/upload/files/penona.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073af075d9e6---52502724209.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/nkbqukrvh8lvet1omrhk003767/22446622241.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728f4eec996---28952473237.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/sezipabokunu.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_off0001c1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1DF 18256 bytes
SHA-256: 1221dc6cced701bb952a62f4c1dff0556addabec09e12fa1961fbf923e72212c
font_01_sfnt_off0001f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F132 10612 bytes
SHA-256: 2f4d9a1c7510a3186809297a751b1e5ef32b6a8a856b7d004ed58730aeccb805
font_02_sfnt_off00020970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.