Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f07594a87455f0…

MALICIOUS

PDF

156.6 KB Created: 2021-07-02 14:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 06643c60dade8bdca6c2ff7346f27802 SHA-1: c4863351afe9691a794441c95d2300992454bc6d SHA-256: e3f07594a87455f0d1329cafe39659adce6811317c8f149f50ad17ba209afa85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=spirited+away+picture+book+japanese+pdf PDF link annotation
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/wizavanejatelajopi.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/tugisi.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d8fb88319---kevulibipamirujujo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077213dbfa45---wefobujin.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/60feae075d543c103ae26eceaef47910/59175430575.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210609070326.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6b53d4275c2b5049afd681f388bba794/minapoluvejitetizo.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/29200412028.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1284d9e78---15875042873.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a2373428---geparilekoboposuj.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082f4c3dcc57---85249585282.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/puxitedudawilok.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/bfhoahl35hgm1eqdk8q3tl4d87/mosoxepolusomixo.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0b295450d93913e90ced6dd9d5938f1/58916904533.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/9b225163dffc2505b547adb747ebdcf0/55029858022.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720f7a7482a---mebagudeku.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073db66a347f---74403751302.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608413fc862ae---mitisirelasev.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/08bcc538e3405559539c02479d9c9222/vijezire.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/r72mpaji9sijvvu2nhtm99avlj/zonutafetolozitagebipeka.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/79ed6c0d880f0eab92a6959eec60b6fc/85759820679.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/tubinege.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA60 20720 bytes
SHA-256: e903f9ae3be9a3c6fd6131ba0c1145aba783217d9297b61e0340e8f777047301
font_01_sfnt_off0001df37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F745 28756 bytes
SHA-256: ff3dfd1d71d502abcf26f775261b86de656c3b004c29b073eac10578db77a1e4
font_03_sfnt_off000249ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249EA 11304 bytes
SHA-256: fac83595b35f07962f9a370a71b42507f5af3c370100a974da04680434d4ad2b

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