Malicious PDF — malware analysis report

Static analysis result for SHA-256 046511054f64277f…

MALICIOUS

PDF

73.4 KB Created: 2021-09-17 07:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1864d19ad51d43098cd4426d70138b11 SHA-1: 9946b9bf754d7be0101b42c641968a42a7dde38f SHA-256: 046511054f64277f3a68261193163a2158073f1deaa10c94034526ec44693765
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristic firings indicating malicious intent, including links to algorithmically-generated URLs and compromised CMS upload storage. The ClamAV detection and ML classifier strongly suggest this is a malicious PDF, likely used as a phishing lure or to redirect users to malware download sites. No scripts were extracted, but the presence of external links points to a likely attack pattern of directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nomylo.ru/uplcv?utm_term=mr+x+2015+full+movie+watch+online PDF link annotation
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/10900476a5aa9dae4da125c595e589ee/64757071435.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/47404390315.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210906_094237.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/68371237562.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/38757992560.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/20534539184.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/dojuguvonowenululexusaja.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/20126797236.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/63105098594.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/basakenopemoputixuravodu.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/57003101855.pdfIn PDF document text
    • http://nguoiquangphianam.com/uploads/files/rajova.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/povefuledate.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/87565142393.pdfIn PDF document text
    • http://labradory.pl/file/rowonib.pdfIn PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/19279501948.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/zukuvisaxe.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/be7d7f9fa36a2faf83b6da3d14697c99/82987604821.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/62381432356.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/sajadi.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2b8d562ed---28023821363.pdfIn PDF document text
    • http://labonscafe.com/userfiles/9850091028.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/48703048642.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/magitelonof.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_off0000b962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB962 11208 bytes
SHA-256: e2430bb9d7b832dc0c29512fc8f324e74a4b6541b18845facf4f352cee4fb852
font_01_sfnt_off0000d3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A4 16948 bytes
SHA-256: 9677ee647bd65f32ca6046838bf50333d84d30027c5e70497c3bc679c0087099
font_02_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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