Malicious PDF — malware analysis report

Static analysis result for SHA-256 e017e922a486da44…

MALICIOUS

PDF

83.5 KB Created: 2021-07-16 11:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ebb08e5dc58e91251c101db39a5b1cf8 SHA-1: 4ed8278568c8ee748aac7af2feafa569c6a33d2b SHA-256: e017e922a486da441ac1b835dbed057f5dadc0cc1f50042fec63ab719b0f2012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to compromised websites or disposable domains, likely to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the presence of multiple external URIs and the 'link farm' heuristics strongly suggest a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=countable+and+uncountable+sets PDF link annotation
    • https://inncredel.com/uploads/56847688614.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/kalavewerajijipo.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608138501dcbe---11730012949.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/fd16706a19530b3381888a7d49fd42e5/tumevuxema.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608119e81b337---35120590965.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/72690003381.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/57411009120.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cf4d30764---samozus.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/41340488506.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/bogevowite.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/gurikoxexut.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/9fe31078b72e0ae94ad0d46a85eb8e2f/57796668946.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/tozulexatijapapiraxin.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8cdc131e9d8ad777e83423b3b2417843/12017175209.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/47534494234.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/marofiwuroxuj.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/a64f0451c27fc4b7f68b7aab62e664ee/81179588008.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/uunea6tl1lke8jc9mrrutu966m/19966285773.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b00a3c866194cdca5ffb10685326bd94/98858734540.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0eb277f836ebae29d26a884fdfaf7510/vazedorog.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d89afc7920c---20894825933.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c279e0e7d4c---xizisokosupurebojivamefa.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a32f471982c718c695d3a828628b4bae/51642213380.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_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 18060 bytes
SHA-256: f3c46762a8d0cb1c73ed308e1f50932e62a3f49e98b8694ca198f9a8df948b29
font_01_sfnt_off00011100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12917 10444 bytes
SHA-256: e78c19955dbf68a911202ee9639e789bd71af7542dd6cc9e9395dd90085c90fd

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