Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0b7423a8d3fa28…

MALICIOUS

PDF

87.3 KB Created: 2021-09-19 22:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f28752d232963785aca216ddd4a99602 SHA-1: c7a7585e549d11bc7650d3a6791a1f59eaaf77cc SHA-256: dd0b7423a8d3fa28b9489595887e56537dfbbd412f2ecd9a153fb9aacf574caf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crewmak.ru/uplcv?utm_term=best+4d+wallpaper+app+for+android PDF link annotation
    • http://ty6600.com/userfiles/file/72285737021.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/sigusilobivavaxaxuwonelef.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/pativorateva.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f07b59ea288bde23f98c387ad3cd9cfc/debofirugoralo.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c3285f3bf97c9eba03161947cd45aa3e/gonopaloxowixewowusag.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/tosugonebejukesekaximut.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c6e385243---24178337618.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a96a72836---garoramuzatomutakosudon.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/59008416720.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/busimojisezozemetigutigar.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/79402087031.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/26122352460.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/35458875980.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/1909365230.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/33728079716.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210917185453.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/16998169134.pdfIn PDF document text
    • http://otczenacts.com/media/files/gorakej.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/29865620359.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/26303068011.pdfIn PDF document text
    • http://synphabase.ch/upload/file/jezajugitefokujela.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/juvopalo.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/39494714724.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_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 17772 bytes
SHA-256: 602b05c02bd591b75c44b87442f521e46091f6c95280c2f9c3ff139ac640b7af
font_01_sfnt_off00011e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E41 10708 bytes
SHA-256: f0d77adbcc1a8563a28f5390908dfac1e97331eb8740c6845186f80e79390914
font_02_sfnt_off0001371c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1