Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fdf92eb79f2dbf…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 17:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 23ecd4465bbe1f4213e76c9c08a1f783 SHA-1: f700ef02f5ccfab4c6e3c41a05dc085d9929e779 SHA-256: 79fdf92eb79f2dbfdb5577d52ff345a10c62b971c94e21f7a98c1b6d58d09630
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a URL with 'utm_term=blox+pink+free+robux+website' suggest a lure for phishing or malware distribution. ClamAV detection and ML classification further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://coretry.ru/uplcv?utm_term=blox+pink+free+robux+website PDF link annotation
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316a1bb06b8---51386581374.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/97472858205.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/11014930277.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/divef.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9c41ce6d2---32080560810.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/94179809387.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/xesin.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/gukilewadawugovadiv.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/rhn977kqe6h9t359rm516vdj9h/fogomaku.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/33353869378.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/purexopekedozerigek.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/76191261510.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/maxaviwarisukuwonuzakor.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/73906088701.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/eacc165303372575174790c8c5c6159b/18696358093.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613512e384fe0---tenekuvogoxoveb.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/lifejotivuwenex.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/28437856429.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/zukiwezipa.pdfIn PDF document text
    • http://moretonassets.net/userfiles/67130682680.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/webeganoliw.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/jovimasalil.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/zejonededalaruvozoxedud.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_off0000d77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77D 10764 bytes
SHA-256: 29f9c64b86075a40f38066611103a6dea8a2a69169b0dba663ede931b4913759
font_01_sfnt_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 17176 bytes
SHA-256: dc24c9703c1d2ec8c7cec1af369cb63bcec9a2765b44db7ef1836eaaa0e8b7da
font_02_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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