Malicious PDF — malware analysis report

Static analysis result for SHA-256 576292ae121b0505…

MALICIOUS

PDF

76.1 KB Created: 2021-09-18 21:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 17467b299686c673145dd85056aaa456 SHA-1: a68809b96f1571ce725d7cad46767b3bf0c0e014 SHA-256: 576292ae121b05054e43554178fd079f44d60a61ef380c9e06537cbd3c8a2961
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pixomot.ru/uplcv?utm_term=the+walking+dead+10x18+streaming PDF link annotation
    • https://pracowniatechart.pl/fckpliki/file/37259845214.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393af92944c---73451009580.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/wupifumewotaberal.pdfIn PDF document text
    • http://izr.fr/files/81907996431.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/sovipisusumanug.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/63253290666.pdfIn PDF document text
    • http://salt17.com/userfiles/files/pejej.pdfIn PDF document text
    • http://clingac.es/d/files/simumovuwaka.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/vabotuwiku.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/43645557807.pdfIn PDF document text
    • https://okazionche.com/files/waduvelaponovegazugib.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/25626378389.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/42858301295.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ggpkgdvqim96tdvtt8aspq5s6c/2848843612.pdfIn PDF document text
    • http://kim-clark.ru/files/file/74503286429.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/52377888229.pdfIn PDF document text
    • http://zgic.ru/!upload/files/luwewu.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/79748972637.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109151945294911.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/84117751131.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/lewazetoranekalem.pdfIn PDF document text
    • http://tadimtursu.com/image/files/31279952700.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138c509b27da---welav.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_off0000c25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25E 17996 bytes
SHA-256: d99aecdab3a17be8f0c7b8fb8642a12dcc8802c263a9218cc6d81b6d757c9a27
font_01_sfnt_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 11200 bytes
SHA-256: 38efc7205b637f3b9eeac6e51857fa92ce9701ad9c87668d6c3fe889b239d2c0
font_02_sfnt_off00010b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1