Malicious PDF — malware analysis report

Static analysis result for SHA-256 363c8f1ccc4e8037…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 00:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a6ae2b09687d36fd26d5d5ad58240f4d SHA-1: b5c6924c5a665cb855aa29977f3beec28f433302 SHA-256: 363c8f1ccc4e803789aac37d5943434572293492f7ba51439f69a998982733ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links strongly suggests a redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://bjqyms.com/filespath/files/20210915135441.pdf In PDF document text
    • http://ty-int.com/files/files/61753171832.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/wiloseseletiseluseso.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/68777193917.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/nobajaliroxujepegosukub.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/94824663997.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/puravutajidezenufir.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/lakoregatiwudumalu.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210923195208.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/sefemuwozujunalezonawalil.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/jatafewaxede.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613773a25e790---61027504212.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/43990715178.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb90bacfe0---pijurolixaga.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/11019346975.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/godademajipipa.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/53112503979.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/duxiselofitogovokazedesi.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/xetuwejomobezaw.pdfIn PDF document text
    • http://ping-property.com/user_img/files/22243676092.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614dbbdf237d1---62962906149.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/92664995169.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/83241919279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=fortnite+download+androidPDF link annotation
    • 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_off0000b20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20F 14948 bytes
SHA-256: 3983fd0eebd71bb19750e8eff76ea1daa2c8661e380c87108971680c0a50fd15
font_01_sfnt_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 10136 bytes
SHA-256: c4450d5d69b632f35ba27958c935f96b65d8db12833a5cf14633806800d51a85
font_02_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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