Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac06f0d7577d51c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-02 15:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac9bcab0a0e4db17fde192cf7ec10b75 SHA-1: effe65139cda7e14483a040c8ad0bcb98bee9897 SHA-256: 3ac06f0d7577d51c8706ea01286bb63d96cf0571f62ba8c0a7042ca14423588c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of multiple links on compromised or disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

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://drafthe.ru/uplcv?utm_term=la+invencion+de+america+edmundo+o%27gorman+pdf PDF link annotation
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/52507823366.pdfIn PDF document text
    • https://luminex.pl/upload/file/52002067153.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/85349792360.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d14292362---42162294191.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/guvagurawufeta.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/gazusuwitexegaxupinu.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/tadizelutajigokovori.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/11988627126.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/f7v4eajmue636iqngnc8dnvfk7/bosora.pdfIn PDF document text
    • http://ocean-ex.com/images/blog//file/80548272924.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/97494694114.pdfIn PDF document text
    • http://asfalon.com/__files/file/5955295801.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/nibodiboradabozebifedala.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/puwutifubuwuxiwapilutoze.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc3cef099---velalipozisokejomaloxipe.pdfIn PDF document text
    • http://jar-ted.pl/file/9612362081.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/samipidejebili.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ff2759dd---58162533231.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/e38385072a630090382a796514829788/zagefexotivivefexu.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/r3cgb80andlm2hv4jnm51afm99/madaladuk.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905a35aeecb---silevufisevogu.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/23791467940.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/44448221148.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_off0000c3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EA 17984 bytes
SHA-256: 797eca217e77bd7f7181b93f531159e5a5ecd2cd89f5bc903cbbd49101f24a36
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10808 bytes
SHA-256: 2920784640316a372ae571f502445688104efca7471f73d186b4fea71560f846
font_02_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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